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CBSE Class 9 Answered

a cylindrical road roller made of iron is 1m wide its inner diameter is 54cm and thickness of iron sheet rolled into the road roller is 2 cm find volume of iron sheet?
Asked by bharathkumar | 15 Nov, 2013, 06:57: PM
answered-by-expert Expert Answer
Width of road roller = 1 m = 100 cm
So, height of the cylindrical road roller = 100 cm
Inner diameter = 54 cm
So, inner radius = 27 cm
Thickness of sheet = 2 cm
So,
Outer radius = 27 + 2 = 29 cm
 
Volume of iron sheet used
= ∏ (R + r)(R - r)h
= (22/7) x (29+27) x (29 - 27) x 100
= (22/7) x (56) x (2) x 100
= 35200 cm3
Answered by | 17 Nov, 2013, 03:43: PM

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