Question

A steel cube has sides of length 20cm. Calculate its mass. (Density of steel = 7.7
g/cm 3 ). Give your answer in g, and in kg.

Answer 1

The mass of a body

$$m=\rho V\\ =(7.7\:\rm g/cm^3)\times (20\:\rm cm)^3=61600\: g=61.6\: kg.$$