Question

What is the mass of a cube having surface area 24 m^2, and density 1 kg/m^3?

(a) 1 kg

(b) 2 kg

(c) 4 kg

(d) 8 kg

The question was posed to me in an internship interview.

My question is taken from Density topic in division Moles, Density & Concentration of Basic Chemical Engineering

Answer 1

Correct answer is (d) 8 kg

The best I can explain: Side of the cube = (24/6)^0.5 = 2 m, => mass of cube = 1*2^3 = 8 kg.