A hollow garden roller, 63 cm wide with a girth of 440 cm, is made of 4 cm thick iron. Find the volume of the iron.
Given,
Width of roller = 63 cm
Girth (perimeter) = 440 cm
= 2πR = 440
= 
= R= 
thickness of roller = 4 cm
inner radius = R - thickness = 70 - 4 = 66 cm
Volume of cylindrical iron = 
41