Question

The volume of a cylinder is 135cm^3.what is the area of one of the circular ends if the length measures 12 cm?

Answer 1

Answer:

Let 'r' be the radius of the cylinder. Circumference=132cm

2πr=132cm

2×

7

22

×r=132cm

∴r=

2×22

132cm×7

∴r=21cm

Volume of a cylinder=πr

2

h=

7

22

×(21)

2

×25=

7

22

×21×21×25=34,650cm

3