Question

The radius of circular base of a cylinder is 14 cm and height is 20cm find the volume of cylinder.​

Answer 1

Question:

the radius of circular base of a cylinder is 14 cm and height is 20cm find the volume of cylinder

Given:

• the radius of circular base of a cylinder is 14 cm

height is 20 cm

To find:

• find the volume of cylinder

Solution:

Radius of the cylinder = 14/2 = 7 cm

We know that$\boxed{\bf{\red{V=πr^{2}h}}}$

Where,

V = volume of the cylinder

r = radius of the cylinder

h = height of the cylinder

π = 22/7

Therefore,

Volume of the cylinder

$\sf{\implies πr^{2}h}$

$\sf{\implies \dfrac{22}{7}×7×7×20\:cm^{3}}$

$\sf{\implies 3080\:cm^{3}}$

Hence, volume of the cylinder is 12320 cm³

__________________________

Answer 2

Answer:

Given: Diameter of base of cylinder =14 cm.

∴ Radius (r)=

2

14

=7 cm.

and Height of cylinder is h=20 cm.

So, Surface area of cylinder =2πr(r+h)

=2×

7

22

×7(7+20)

=44×27

Surface area of cylinder =1188 sq.cm.

Volume of cylinder =πr

2

h

=

7

22

×7

2

×20

=22×7×20

Volume of cylinder=3080 cu.cm