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\ c m^3` of iron has 8 gram mass approximately. (Use `pi=355//115` )

Explanation

Let r cm be the radius and h cm be the height of a cone then

`r = 6 cm, h = 9 cm`

volume of cone` = 1/3pi r^2h`

`= (1/ 3pi x 6 x 6 x 9) cm^3`

`= 108pi cm^3`

Let R cm be the radius and H cm be the height of cylinder, then

`R = 6 cm (:. r = R)`

`H = 110 cm`

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