Question

What is the density of a liquid of mass 20 kg, enclosed in a cuboid of surface areas of three sides as 1 m^2, 2 m^2, 5 m^2, and one of its sides is 2 m?

(a) 1 kg/m^3

(b) 2 kg/m^3

(c) 3 kg/m^3

(d) 4 kg/m^3

I got this question at a job interview.

Question is taken from Density topic in chapter Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

Right answer is (b) 2 kg/m^3

Explanation: Sides of the cuboid are 1m, 2m and 5m, => volume = 10 m^3, density = 20/10 = 2 kg/m^3.