Question

Tick (✓) the correct answer:
An iron beam is 9 m long, 40 cm wide and 20 cm high. If 1 cubic metre of iron weighs 50 kg, what is the weight of the beam?
(a) 56 kg
(b) 48 kg
(c) 36 kg
(d) 27 kg

Answer 1

(c) 36 kg

Volume of the iron beam $=9\times 0.4\times 0.2=0.72m^3$
∴ Weight$=0.72\times 50=36kg$