A cylindrical road roller made of iron is 1m wide. Its inner diameter is 54cm and thickness of the iron sheet rolled into the road roller is 9cm. Find the weight of the roller if 1c.c. of iron weights8 gm.

Explanation

"here inner radius`=27cm`
outer radius`=36cm`

volume of cylindrical roller is`=pi(R^2-r^2)h`

`=pi(36^2-27^2)100`
`=178200cm^3`
weight of roller`=density xxvolume`

weight of roller`=178200xx8`
`=1425.6kg`