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

Answer From the figure: x + 50o = 180o (Linear pair) x = 180o - 50o x = 130o And, y = 130o (Vertically opposite angles) Now, x = y = 130o (Alternate interior angles) Hence, The theorem says that when the lines are parallel, that the alternate interior angles are equal. And thus the lines must be parallel. AB || CD

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Find the cost of making 1 such pillar?? Cost of making 1m cube is 700₹. Radius is 20 cm and height is 10 m of pillar. This is cylinder shaped .

Posted by Amrit Saini 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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The curved surface area of a right circular of height 14cm is 88cm2 .find the diameter of the base of the cylinder

Posted by Sneha Nayak 3 years, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Divya Raj 3 years, 8 months ago

Curved surface area of cylinder= 2πrh 88cm^2 = 2*22/7*r *14cm 88cm^2 = 44*2r 88cm^2/88cm =r r= 1 cm Diameter= 2r = 2*1= 2 cm ans.

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Krishvi Anand 3 years, 8 months ago

1 CM radius and therefore diameter will be 2r= 2×1=2 cm

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Khilesh Kumar 3 years, 8 months ago

1cm radius So, 2cm diameter

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What is vice versa

Posted by Vishesh Vaishnaw 3 years, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Kuldeep Thakur 3 years, 8 months ago

Vice versa is a latin phrase that means ' The other way round '

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Pranav Mishra 3 years, 8 months ago

It mean that reverse of a thing that you had said before or hindi me bola jaaye to ulat palat krdena

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if a+ b +c is equal to 3，a square +b square +c square is equal to 5 and a cube+ b cube+ c cube is equal to 9 find the value of abc

Posted by Komal Makker 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Priyal Gupta 3 years, 8 months ago

a=0, b=1, c=2

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Let r1 and r2 are the remainder when the polynomials y 3 + 2y2 – 5ay – 7 and y 3 + ay2 – 12y + 6 are divided by y + 1 and y – 2 respectively. Find the value of a in each of the following cases, if (i) 2r1 + r2 = 6 (ii) r1 = r2 (iii) 1 2 r 2 r 3 = (iv) r1 – r2 = 5

Posted by Suvidhi Garg 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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Write Heron's formula

Posted by Shooter Sherni 3 years, 8 months ago

CBSE > Class 09 > Mathematics

5 answers

Shreya Tiwari 3 years, 8 months ago

area = √s(s-a)(s-b)(s-c) S=a+b+c/2

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Bbch Fbx 3 years, 8 months ago

S=a+b+c/2 area = √s(s-a)(s-b)(s-c)

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Naman Singh 3 years, 8 months ago

S=a+b+c/2and then Area =under rogt(s-a)(s-b)(s-c).

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Samruddhi ? 3 years, 8 months ago

Under root s(s-a)(s-b)(s-c)

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Shooter Sherni 3 years, 8 months ago

Write Heron's formula

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0.123bar is equal to

Posted by N S 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Priyal Gupta 3 years, 8 months ago

If you are asking about it's p/q form then it is equal to 41/333

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A square sheet of paper is converted into a cylinder by rolling it's side, what is the ratio of the base radius to the side of the square

Posted by Barsha Rani Sahu 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Mahrosh Khan 3 years, 8 months ago

Answer r/s = 1/2π Explanation When square sheet of paper is converted into a cylinder by rolling, circumference of base is equal to side od square. Let s be side of square and r be radius of base of cylinder. s = 2πr r/s = 1/2π Hence, ratio of the base radius of cylinder to the side of square is 1:2π.

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Is 0.5918 a rational number

Posted by Arjun Tomar 3 years, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Anushka Jalan 3 years, 8 months ago

Yes as can be written as p/q

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Sarita Panda 3 years, 8 months ago

5918/1000=>2959/500

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Yash Raj 3 years, 8 months ago

Yes as it can represented as p/q

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Match the time on the dijital watch and the clock

Posted by Prasoon Dwivedi 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Ch-11 exercise 11.2 ( question no.4)

Posted by Ghanshyam Sharma 3 years, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Japnidh Kaur 3 years, 8 months ago

You can check in this app only by opening NCERT solutions in any chapter.

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Japnidh Kaur 3 years, 8 months ago

Of which subject?

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prove the theorem for median divides triangle into two equal parts

Posted by Saniya Shree 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

11.2 Q2

Posted by Vishal Mewara 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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Abcd is a cycle quadrilateral whose diagonals interect at a point E. If

Posted by Savan Meena 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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??? ?????? ??????? ??? ?????? ??????? ??? ??? ????? surface ???? ?? ????? ???????? ???????? ?? 1:2 ???? ??? ?????? ?? ? .? .? ?? 616 ??

Posted by Bunty Chauhan 3 years, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Harsh Gautam 3 years, 8 months ago

The answer is ΠΠΠΠΠ¶¶∆}|×`¶~

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आदित्य कुमार झा 3 years, 8 months ago

Kya style mein likha hai

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Chapter 7 exersice 7.1 question no. 7

Posted by Mayank Anand 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

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√3+√3=

Posted by Alphonsa Jimmy 3 years, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Naman Singh 3 years, 8 months ago

3.46

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Krish Achra? 3 years, 8 months ago

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Mohit Kumar 3 years, 8 months ago

2√3

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In a Pytyhagorean triplet, one number is 12 the others numbers are ____& ______.

Posted by Ranya Sharma 3 years, 8 months ago

CBSE > Class 09 > Mathematics

2 answers

Dhruv Rangari 3 years, 8 months ago

I know it is a question of circles where you have been given length of chord 24 cm and radius 13 cm so you have to find distance between the chord and centre so the answer is 5 because it is the triplet

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Sarita Panda 3 years, 8 months ago

It can be various number. One type of Pythagorean triplet is (13,12,5)where 13 is the hypothenues.

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If two lines intersect each other.prove that vertically opposite angles are equal

Posted by Kirthikha Jaganathan 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Alphonsa Jimmy 3 years, 8 months ago

When two lines intersect each other, then the opposite angles, formed due to intersection are called vertical angles or vertically opposite angles. A pair of vertically opposite angles are always equal to each other. Also, a vertical angle and its adjacent angle are supplementary angles, i.e., they add up to 180 degrees. For example, if two lines intersect and make an angle, say X=45°, then its opposite angle is also equal to 45°. And the angle adjacent to angle X will be equal to 180 – 45 = 135°.

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What is Adjacent ray

Posted by Manwinder Riar ☺️ 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Alphonsa Jimmy 3 years, 8 months ago

Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.

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Area of a cuboid

Posted by Abhi Raj 3 years, 8 months ago

CBSE > Class 09 > Mathematics

4 answers

Topper Prathamesh Badhe"'/-+,=?! 3 years, 8 months ago

TSA of cuboid is 2(lb+bh+HL) CSA of cuboid is 2h(l+b)

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Raghuram Ramya 3 years, 8 months ago

TSA of cuboid is 2(lb+bh+HL) CSA of cuboid is 2h(l+b)

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Naman Singh 3 years, 8 months ago

Bro if you want Total surface area of cuboid is 2(lb+bh+hl) Lateral surface area of cuboid is 2(l+b)*h

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Niharika Sharma 3 years, 8 months ago

2(lb+bh+hl)

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If (3/4)^6 × (16/9)^5 = (4/3)^x+2 find x

Posted by Aditi Singh 3 years, 8 months ago

CBSE > Class 09 > Mathematics

1 answers

Khushi Kaur 3 years, 8 months ago

(3/4)6*(16/9)5 =(4/3)X+2 (3/4)6*(4/3)10=(4/3)X+2 (4/3)-6*(4/3)10=(4/3)X+2 (4/3)-6+10=(4/3)X+2 (4/3)4=(4/3)X+2 SINCE BASES ARE EQUAL X+2=4 X=2

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The total surface area of a cylinder is 462cm².Its curved surface area is one third of its total surface area.Find the volume of the cylinder.

Posted by Modi Srivastava 3 years, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Lakshya Shrivastava 3 years, 8 months ago

find a&b , if 2-√5 =a√5 + b 2+3√5

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Khushi Kaur 3 years, 8 months ago

Let r cm be the radius of the base and h cm be the height of the cylinder, Then, total surface area of cylinder = 2πr (r + h) Curved surface area of cylinder = 2πrh We have, Curved surface area = 1/3(Total surface area) = 1/3 x 462 cm2 = 154 cm2 ⇒ 2πrh = 154 Also, 2πrh + 2πr2 = 462 ⇒ 154 + 2πr2 = 462 ⇒ 2πr2 = 462 - 154 = 308 cm2 2 x 22/7 x r2 = 308 ⇒ r2 = 308 x 7/2 x 22 = 72 ⇒ r = 7 cm Again 2πrh = 154 ⇒ 2 x 22/7 x 7 x h = 154 ⇒ h = 154/2 x 22 = 7/2 cm Volume of the cylinder = πr2h = 22/7 x 7 x 7 x 7/2 = 539 cm3

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Palak Gupta 3 years, 8 months ago

Given, total surface area of cylinder = 462 square cm. Also, CSA of cylinder = 3 TSA of ccylinder ⇒TSA=2πrh+2πr2 ⇒TSA=CSA+2πr 2 ⇒TSA= 3TSA +2πr 2 ⇒ 32TSA =2πr 2 ⇒ 3TSA =πr2 ⇒ 3462 = 722 ×r 2 ⇒r=7cm Now, CSA of cylinder = 3 TSA of ccylinde = 3462 =154cm 2 ⇒2πrh=154 ⇒2× 7 22 ×7×h=154 ⇒h= 27cm Therefore, volume of the cylinder =πr 2 h= 722 ×7 2 × 27 =539cm 3 Hence, volume of the solid cylinder is 539cm 3 .

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