An iron pole consisting of a cylindrical portion 110 cm
Question:

An iron pole consisting  of a cylindrical portion 110 cm high and of base diameter 12 cm is surmounted by a cone 9 cm high. Find the mass of the pole, given that 1 cm3 of iron has 8 gram mass approximately.
(Use : π = 355/115)

Solution:

Volume of cylinder

Volume of cone

Therefore,

Therefore,

Mass of the pole