Question

the circumference of a right circular cylinder is 132 cm and its height is 25 cm. find the capacity of the cylinder.

Answer 1

Circumference of the base of the cylinder = 132cm.

Also, circumference = 2πr.

So, Atq, 2πr = 132cm.

or. 2 × 22/7 × r = 132cm.

or r = 132cm × 7 /22 × 2.

Therefore r = 21cm.

Height of the cylinder = 25cm.

Therefore volume =${πr^2h }$

= 22/7 × 21cm × 21cm × 25cm.

= ${34650cm^3}$

Answer 2

Circumference of a right circular cylinder = 132 cm

Height = 25 cm

circumference = 132 cm

2πrh= 132

2 × 22/7 × r × 25 = 132

r = 132 × 7/ 2×22×25

r = 21/25

r = 0.84

volume of cylinder=πr²h

= 22/7 × 0.84² × 25

= 55.44