Question

find the mass of a long lead pipe of 400 CM, if external diameter of the pipe is 3cm and internal is of 2.4 cm and mass of 1 cm cube of lead is 11.4 gram ​

Answer 1

Answer:

Volume of pipe=π(r22−r12)×h=722((1.2)2−(1.2−0.2)2)×350

=1100(1.44−1)=1100×0.44

=484cm3

Weight of pipe=484×11.4=5517.6g=5.518kg