Question

A HOLLOW GARDEN ROLLER 63 CM WIDE WITH A GIRTH OF 440CM IS MADE OF IRON 4CM THICK .THE VOLUME OF IRON.​

Answer 1

Circumference of girth of roller = 440 cm

2*Pi*R = 440 = R (220*7/22) = 70 cm

Outer radius = 70 cm & inner radius = 70-4 cm = 66 cm

Therefore Volume or iron = Pi [(70^2 - 60^2)]*63

= 58752 cm^3