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
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Answer:
Step-by-step explanation:
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
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