Question

You have a piece of balsa wood that is 45 cm long, 8 cm high, and 4 cm wide. It weighs 50 g. What is its density?

Answer 1

Length=45cm

Breadth=4cm

Height=8cm

Mass=50g

Volume=(45×4×8)cm^3

=1440cm^3

Density=Mass/Volume

=50/1440

=0.034g/cm^3

Answer 2

Density =mass / volume
Mass 50 g = 0.05kg
Volume =0.45*0.08 *0.04 (since 45 cm =0.45 m, 8 cm =0.08m, 4cm =0.04m)
Volume =0.00144m^3
Density =0.05/0.00144
Density =347.22km/m^3