Question

What is the mass of a cone of radius 1 m and height 3 m having specific gravity 0.1? (Density of water = 1000 kg/m^3)

(a) 314.16 kg

(b) 425.24 kg

(c) 136.16 kg

(d) 325.24 kg

This question was posed to me in a national level competition.

The above asked question is from Specific Gravity in division Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

Correct choice is (a) 314.16 kg

The explanation is: Volume of cone = (1/3) π1^2*3 = 3.1416 m^3, density of cone = 0.1*1000 = 100 kg/m^3, => mass of cone = 100*3.1416 = 314.16 kg.