CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

A rational number, in Mathematics, can be defined as any number which can be represented in the form of p/q where q ≠ 0. Also, we can say that any fraction fits under the category of rational numbers, where denominator and numerator are integers and the denominator is not equal to zero.

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Akhil made a cuboid of plasticine.Length,Breadth and height of the cuboid are 25cm, 25 cm and 50 cm. how many minimum such cuboids he needs to make a perfect cube?

Posted by Marturu Ramya 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ayush Thakur 4 years, 1 month ago

Side length of cube = LCM (l, b, h) =LCM( 25cm, 25cm, 50cm) = 50 cm n volume of cuboid= volume of cube n(25*25*50) = 50cm cube n = 50*50*50/25*25*50 = 4 4 cuboids he needs to make a perfect cube .

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A certain number of men went to a hotel. Each men spent as many rupees as one fourth of the men. If the total bill paid was ₹20449, then how many men visited the hotel?

Posted by Marturu Ramya 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 3 years, 11 months ago

Given :

Each man spends = of the men

Total money paid = Rs. 20499

To find :

Number of men visited the hotel

Solution :

Consider the number of men as y

Each man spent =

★ Equation :

The number of men visited the hotel is 286.

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A General arranges his soldiers in rows to form a perfect square. He finds that in doing so, 60 soldiers are left out. If the total number of soldiers be 8160, then find the number of soldiers in each row.

Posted by Marturu Ramya 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Marturu Ramya 4 years, 1 month ago

How can the answer be 90 soldiers in each row???????????????

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Nikhil Kumar 4 years, 1 month ago

90 soldiers in each row

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Mukul Kumar 😎 4 years, 1 month ago

90 soldiers in each row

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Solve the equation_root 2 minus 2 multiplied by 4 multiplied by root 2

Posted by Shikha Chamoli 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Raghav Agrawal 4 years, 1 month ago

(√2−2)4×√2 =8−8√2

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Raghav Agrawal 4 years, 1 month ago

(√2−2)4×√2= 4−8√2

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Marturu Ramya 4 years, 1 month ago

√2-2(4)(√2) √2-8√2 = -7√2

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Population of riverrun in 8000. If 20% of them are natives of winterfell , Find total number number of natives of winterfell.

Posted by Dhruv Choudhary 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Dhruv Choudhary 4 years, 1 month ago

Population of riverrun in 8000. If 20% of them are natives of winterfell, Find total number of natives of winterfell.

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The slant height and base diameter of a conical tomb are 25m and 14m respectively. Find the cost of white_ washing its curved surface at the rate of 210 per 100m2

Posted by Varsha Kanwar 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Varsha Kanwar 4 years, 1 month ago

The mass per unit volume of substance is called density (density=mass\ volume. Arrange the following in order of increasing density_air. exhaust from chimneys,honey,water,chalk,cotton and iron.

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Muskan Singh 4 years, 1 month ago

Height = 25m Diameter =14m Radius=D/2 =14m/2 =7m CSA of cylinder = 2×22/7×25m×7m = 1100m2 Cost of whitewashing = 210/100m2 Cost of whitewashing 1m2=210/100m2 Rs.2.1/m2 Cost of whitewashing 1100m2= Rs.2.1/m2×1100m2 =Rs.2310

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Expand (3x/2 +1)cube

Posted by Lalit Chandra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Aditi Shenoy 4 years, 1 month ago

That is equal to 27x/(2×2)+(2×1×2)+(1×1)=27x/4+4+1 =27x/9= 3x(as 9 and 27 will cancel out!)

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If x-3 is factor of x square-ax- 5 then find a

Posted by Lalit Chandra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Rajendra Charmode 4 years, 1 month ago

-4/3

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What is hypotenuse detail

Posted by Sneha Pal 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Roshan Kumar 4 years, 1 month ago

The Longest side of a right triangle is known as Hypotenuse

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Mdsajid Sheikh 4 years, 1 month ago

Ninth class ka Math ka syllabus

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Riya Sarda 4 years, 1 month ago

In a right angled triangle , the side opposite to the right angle is known as the hypotenuse....

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(-2x+3x+2z)

Posted by Hetvi Joshi 4 years, 1 month ago

CBSE > Class 09 > Mathematics

4 answers

Tejas More 4 years, 1 month ago

x+2z

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Chhavi Sharma 4 years, 1 month ago

x+2z

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Chandan Kumar 4 years, 1 month ago

x+2z

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Lalit Chandra 4 years, 1 month ago

x+2z

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Expand (x+2y+4z)

Posted by Hetvi Joshi 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

P R I N C E 4 years, 1 month ago

x + 2

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6.If x + 1 ? = √5 ,Find ? 2 + 1 ? 2 , ? 4 + 1 ? 4 .pls this also

Posted by Vedant Bhadra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Mdsajid Sheikh 4 years, 1 month ago

Ninth class ka Math ka syllabus Hindi medium

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Marturu Ramya 4 years, 1 month ago

Is it X square and also is it 1/X????

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t should be write an equation of any two lines passing through ( –1, 4). Pls I need it urgent fast pls

Posted by Vedant Bhadra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Marturu Ramya 4 years, 1 month ago

There are infinitely many such lines passing through(-1,4). You can write equation as -x+y=3 Similarly u can write as many equations as possible.....

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. Find the area of a triangle whose base and altitude are 5cm and 4cm, respectively.pls tell me with full solution

Posted by Vedant Bhadra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Vandana Rustagi 4 years, 1 month ago

Area of triangle is 1/2 *base*height 1/2*5cm*4cm which is 5cm*2 because 1/2 divides 4 into 2. So the answer is 10 cm square

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Vedant Bhadra 4 years, 1 month ago

Thx

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Marturu Ramya 4 years, 1 month ago

Since area of triangle =1/2* base*height =1/2*5cm*4cm (substitute the values given to you) =5*1 (since 1/2 and 4 cancels, 5 will be remaining) =5

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The mirror image of p(3.4)on y axis is

Posted by Faizan Khan 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Student 10Th 4 years, 1 month ago

-3,4

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Represent root 2 on number line using pythagoras theorem

Posted by Arpit Mishra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Lalit Chandra 4 years, 1 month ago

If both height and base is equal of right angled triangle then , Hypotenuse square = perpendicular square + base square That is H square (H is hypotenuse)= 1square + 1 square H square = 2 H= root 2 Note : It is only possible when both perpendicular and altitude is equal that is 1.

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Marturu Ramya 4 years, 1 month ago

I think we cannot draw this in this app it is better to search in google

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Abdul Raouf Shams 4 years, 1 month ago

You can get this answer if you search in on Youtube

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What is capacity of a cylinder if 20 hemispherical bowls are required to fill cylinder , radius of hemispherical bowl is 2cm.

Posted by Annu Kaur 4 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

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HCF of co prime number 4 and 15 was found as

Posted by Seema Kavalramani 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Seema Kavalramani 4 years, 1 month ago

HCF of co prime number 4 and 15 was found as follows by factorisation

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Bhumika Sharma ✓ 4 years, 1 month ago

HCF of co-prime numbers 4 and 15 was found as follows by factorization: 4 = 2 × 2 and 15 = 3 × 5 since there is no common prime factors, so HCF of 4 and 15 is 0..........nice to help u ☺️

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30 students are there in a class. All of them shakes their hands together . How many hands are there ?..................it is a riddle answer it carefully then I'll answer it ? it is so easy at all ..........so it is the last question I asked and today gonna answer it ? many of u said answer is 435 ???kaha se bhai as well as many of u said 30???bs ek ka hi answer sahi tha that is sixty ?I asked how many hands will be there so as per 30 students concluding 2 hands the answer should be 60 only ????u guys were confused at all.

Posted by Bhumika Sharma ✓ 4 years, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Devashish Sengupta 4 years, 1 month ago

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Chandan Kumar 4 years, 1 month ago

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Marturu Ramya 4 years, 1 month ago

How can the answer be 435??????????

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Marturu Ramya 4 years, 1 month ago

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Veer Pratap 4 years, 1 month ago

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Ex 13.1 Q 3

Posted by Harshit Kohli 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Bhumika Sharma ✓ 4 years, 1 month ago

Let length, breadth, and height of the rectangular hall be l, b, and h respectively. Area of four walls = 2lh+2bh = 2(l+b)h Perimeter of the floor of hall = 2(l+b) = 250 m Area of four walls = 2(l+b) h = 250h m2 Cost of painting per square meter area = Rs.10 Cost of painting 250h square meter area = Rs (250h×10) = Rs.2500h However, it is given that the cost of paining the walls is Rs. 15000. 15000 = 2500h Or h = 6 Therefore, the height of the hall is 6 m. ..........nice to help u ☺️

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Ayush Thakur 4 years, 1 month ago

Given: Perimeter of rectangular wall = 250 m ……….(i) Now Area of the four walls of the room = 1500 m2 ……….(ii) Area of the four walls = Lateral surface area = 1500 [using eq. (i) and (ii) = 6 m Hence required height of the hall is 6 m.

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Find the complement angle of 55 degree

Posted by Mau Yadav 4 years, 1 month ago

CBSE > Class 09 > Mathematics