Question

A block of metal has a length of 20 cm, breadth 10 cm and height 5 cm. Its mass is 2.7 kg. Find the density of the metal in g/cm³. Find out what the block is made of.

Answer 1

Volume of the block = V = Length $\times$ Breadth $\times$ Height
Volume = V = 20 $\times$ 10 $\times$ 5
= 1000 cm³
Mass of the metal block = m = 2.7 kg = 2700 gm
Density of the metal block = Mass / Volume
= 2700 / 1000
= 2.7 g/cm³
Thus, the density of the metal block is 2.7 g/cm³.
The metal block is made of aluminium (density = 2.7 g/cm³).