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

height of the cylinder =1m capacity of the cylinder=volume of the cylinder=15.4 litres =15400 cubic cm =0.0154 m sq. so,r2h=0.0154 m sq. 22/7*r2*1=0.0154 r2=0.0154*7/22 r2=0.0049 r=0.07 so the total surface area =2rh+2r2 =2r(r+h) =2*22/7*0.07(0.07+1) =0.44*1.07 =0.4708 m sq.

2Thank You

Vinayak Singh 4 years, 1 month ago

What would you like to ask? 9th Maths Surface Areas and Volumes Surface Area of Right Circular Cylinders and Cones The capacity of a closed cy... MATHS The capacity of a closed cylindrical vessel of height 1 m is 15.4 litres. How many square meters of metal sheet would be needed to make it? MEDIUM Share Study later ANSWER Height of the vessel=1m Capacity of the vessel=15.4 liters =100015.4m3=0.0154m3 Volume of the cylindrical vessel=πr2h=0.0154 ⇒722×r2×1=0.0154 r2=220.0154×7=0.0049 ⇒r=0.07m Metal sheet needed to make the cylindrical vessel=T.S.A of the cylindrical vessel. ⇒2πr(r+h)=2×722×0.07(0.07+1)m2 =0.4708m2 ∴0.4708m2 of sheet will be required to make the vessel.

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ANSWER

Multiply ( 6 root 5 ) × (7 root 5 ) × (3 root 5) ?

Posted by Mahek ?? Patel 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Ashmit Patel 4 years, 1 month ago

6✓5×7✓5×3✓5 42×5×3✓5 210×3✓5 630✓5

1Thank You

Arnav Kaushik 4 years, 1 month ago

Take √5 common And multiply 6x3x7=126 Answer will be 126√5

1Thank You

Ayaz Parvez 4 years, 1 month ago

1408.72

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ANSWER

How to find area of triangle by Heron's Formula

Posted by Bhumika Jaiswal 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Danish Khan 4 years, 1 month ago

s = a + b + c / 2

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Danish Khan 4 years, 1 month ago

1.- Find the semi - perimeter of the triangle = s = a+b+c/2 2. s will be semi - perimeter 3. root of s ( s - a ) ( s - b ) ( s - c )

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Jiya .... 4 years, 1 month ago

There is an formula for finding this m... Read it in ur book

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ANSWER

In the given figure , ab and cd are two straight lines, intersecting each other at a point o. If angle coe =90°, find the values of x,y and z.

Posted by Vishnu Prajapati 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Tanishq Chouhan 4 years, 1 month ago

Figure????

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ANSWER

Definition of probability

Posted by Jaspreet Singh 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Vishnu Prajapati 4 years, 1 month ago

Probability is simply how likely something is to happen. Whenever we're unsure about the outcome of an event, we can talk about the probabilities of certain outcomes—how likely they are.

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ANSWER

A hemispherical tank emptied by a pipe at the rate of 5 liter per minute how long will it take to empty the tank if the diameter is 1.5 m

Posted by Shreyansh Mishra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Pradeep Singh 4 years, 1 month ago

3.3

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ANSWER

If one of the angles of a triangle is 130°, then the angle between the bisectors of the other two angles can

Posted by Mishika Pandey 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 4 years, 1 month ago

Consider a △ABC,such that ∠BAC=130 ∘ and bisectors of ∠B and ∠C meet at O. To find: ∠BOC Now, in △ABC, ∠BAC+∠ABC+∠ACB=180 130+∠ABC+∠ACB=180 (Angle sum property) ∠ABC+∠ACB=50 2 1 (∠ABC+∠ACB)=25 ∠OBC+∠OCB=25 (OB and OC bisect ∠ABC and ∠ACB) Now, in △OBC, ∠OBC+∠OCB+∠BOC=180 25+∠BOC=180 ∠BOC=155 ∘ .

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ANSWER

If x+y=5 and xy=4 find x-y

Posted by Shreyansh Mishra 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

(x+y)² = x²- 2xy + y²

= x²+ 2xy + y²- 4xy

= (x+y)²- 4xy

= 5² - 4 × 4

= 25 - 16 = 9

∴ x - y = √9

= 3

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ANSWER

Write coefficients of x2 in each of the following . 1.x2 + 4.

Posted by Geeta Arora 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Tanishq Chouhan 4 years, 1 month ago

0Thank You

Naina Gupta 4 years, 1 month ago

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Abha Mahant 4 years, 1 month ago

The correct answer is 1

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ANSWER

Factorize : 25x² -10x+1-36y²

Posted by Trishla Jain 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Student 10Th 4 years, 1 month ago

25x^2 - 10x +1 can be written as (5x-1)2 al 80% 5.0 Now By identity a^2 -b^2 = (a-b)(a+b) (5x - 6y -1( 5x +6y-1)

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ANSWER

The simplest form of a^m/a^m

Posted by Mallikarjunappa Mallikarjunappa 4 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Tanishq Chouhan 4 years, 1 month ago

1Thank You

Abha Mahant 4 years, 1 month ago

The answer is 1

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Trishla Jain 4 years, 1 month ago

2Thank You

ANSWER

Any solution of the linear equation 2x + 0y = 9 in two variables

Posted by Shivansh Verma 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Shivansh Verma 4 years, 1 month ago

Wrong ans

1Thank You

Anubhav Singh 4 years, 1 month ago

x=9/2, 18/4, 27/6... y = any number which you want

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ANSWER

The sum of angle of a triangle is 180 degree

Posted by Suaib Khan 4 years, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Tanishq Chouhan 4 years, 1 month ago

Yes

1Thank You

Hardick Choudhary 4 years, 1 month ago

Yes

1Thank You

Akash Jha 4 years, 1 month ago

Yes it is true

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Shivansh Verma 4 years, 1 month ago

Yes

1Thank You

Ananya K 4 years, 1 month ago

Yes the sum of the triangle is 180°

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ANSWER

1 xhapter

Posted by Vaishali Singh 4 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

A river 3m deep and 40 m wide is flowing at the ratio of 2km per hour.How much water will fall into in a minute

Posted by Crazy Girl 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

Given, a river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour.

Area of cross section of the river =3 × 40=120m²

Now, volume of water flowing through this cross section in every minute = Area * rate

= 120 × 2 km/hr

= 120 ×(2000/60) m/min

= 2 × 2000

= 4000m³

Since1m³=1000 litres

So, 4000m³=4000 × 1000 litres =4000000 litres

So, in 1 minute, water will fall into the sea is 4000000 litres.

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ANSWER

In which quadrant will the point allies if ordinate is 2 and abcissa is -3

Posted by Tohib Mohd 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Anushka Agarwal 4 years, 1 month ago

2nd Quadrant. Since, abscissa means the "x-axis" and ordinate means "y-axis".

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Garv Dubey 4 years, 1 month ago

It will lie on 4th quadrant

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ANSWER

The LSA of cube is 100 m^2 . What is the volume of the cube

Posted by Nishita Goel 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

Given, lateral surface area of a cube = 100 m²
We know that, lateral surface area of a cube = 4 x (Side)²
⇒ 100 = 4 x (Side)²
⇒ (Side)² = 100/4 = 25
⇒ Side = √25 = 5 m
[taking positive square root because side is always a positive quantity]
Now, volume of a cube = (Side)³ = (5)³= 5 x 5 x 5 = 125 m³
Hence, the volume of the cube is 125 m³.

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ANSWER

18. One of the factors of (25x^?- 1) + (1 + 5x)^?is:-

Posted by Ankit Samanta 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Rupesh Nehra 4 years, 1 month ago

Answer is 25x^2

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ANSWER

in the figure ?? ∥ ??, ∠ ? ? ? = 1400 ,∠ ? ? ? = 300 , ???? ∠ ? ? ?.

Posted by Alan Alackal Alan 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Abhishek Chaudhary 4 years, 1 month ago

Mera Bhai question pura send kiya karo

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Shabd Kumar 4 years, 1 month ago

0Thank You

ANSWER

Write four solutions of the equation 3.14x+y=9

Posted by Arun Singh 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

14x + y = 9

1) if x =1

14(1) + y = 9

y = 9 - 14
y = -5

2) If x = 0

14(0) + y = 9

y = 9
3) if x = -1

14(-1) + y = 9

y = 9 + 14
y = 15

4) If x = 2

14(1) + y = 9
14(2) + y = 9
y = 9 - 28
y = -19

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ANSWER

What is line system

Posted by Nidhi Nidhi 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankit Samanta 4 years, 1 month ago

0Thank You

Nidhi Nidhi 4 years, 1 month ago

line segment is bounded by two distinct points on aline

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ANSWER

Are the square roots of all positive integers irrational? If not, give an example of the square root of a number that is a rational number

Posted by Ananya K 4 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Naina Gupta 4 years, 1 month ago

√6,√8..

0Thank You

Garv Dubey 4 years, 1 month ago

The square root of 4 , 25 , 16 are rational numbera

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ANSWER

(1upon 2 -1/3+12z)²

Posted by Deepanshi Antil 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Tiger$ Praful Jawale 4 years, 1 month ago

3/5+36z^2

3Thank You

ANSWER

Prove that the sum of triangle is 180 degree

Posted by Omanshu Gupta 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 4 years, 1 month ago

Given : A triangle ABC. To prove : ∠A+∠B+∠C=180 o ⟹∠1+∠2+∠3=180 o Construction : Through A, draw a line l parallel to BC. Proof : Since l∥BC. Therefore, ∠2=∠4 .......eq(i) And, ∠3=∠5......eq(ii) adding eq(i)and(ii) Therefore, ∠2+∠3=∠4+∠5 ∠1+∠2+∠3=∠1+∠4+∠5 [adding∠1bothSide] ∠1+∠2+∠3=180 o Thus, the sum of three angles of a triangle is 180 o . solution

1Thank You

ANSWER

Find the value of polynomial 1/3 p - 1/4 = 6 then what will, the value of 1/3 p + 1/4

Posted by Omanshu Gupta 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Anubhav Singh 4 years, 1 month ago

26/4

0Thank You

ANSWER

Define pie

Posted by Shivani Mani 4 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 4 years, 1 month ago

A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents.

1Thank You

ANSWER

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