Tick (✓) the correct answer:


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


(c) $36 \mathrm{~kg}$

Volume of the iron beam $=9 \times 0.4 \times 0.2=0.72 \mathrm{~m}^{3}$

$\therefore$ Weight $=0.72 \times 50=36 \mathrm{~kg}$

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