Find the weight of a lead pipe 3.5m long, if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1 cubic cm of lead weighs 11gm.

Explanation

Volume of lead`=pi*1.2*1.2*3.5-pi*1*1*35`

Volume`=pi(1.44*3.5-3.5)`

`=4.84cm^3`

1 `cm^3` lead weight=11gm

4.84 `cm^3` lead weight`=11*4.84`

`=532.4kg`.