Question

Find the volume of cylinder whose base area is 21cm2 and height is 7 cm​

Answer 1

Answer:

9693.18

Step-by-step explanation:

volume = πr$r^{2}$h

            = 3.14 x $21^{2}$ x 7

            = 9693.18

I hope it helps you..

Answer 2

Given

Base area of cylinder is 21cm²

Height of cylinder is 7cm

To Find

Volume of cylinder

$\sf\huge\bold{\underline{\underline{{Solution}}}}$

We have given the base area

Base means at the bottom of the cylinder whose area is given.

At the base circle is here and we know that area of Circle is πr²

So,base area of cylinder is πr²

step by step explanation

We will first apply base area formula and hence we will find the radius of Cylinder.

After finding radius we will apply volume formula to find out the volume of cylinder.

Base area of Cyclinder=21cm²

=>πr²=21

=>22/7r²=21

=>r²=21×7/22

=>r=√147/22

Volume of cylinder=πr²h

Volume of cylinder=22/7×(√147/22)²×7

Square of any root value then root will remove.

=>7 and 22 gets cancelled by itself.

Volume of cylinder=147cm³