Question

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

Answer 1

Answer:

area of beam = lbh

l = length = 9 m

b = width = 0.40 m

h = height = 0.20 m

then area = 9 × 0.4 × 0.2

= 0.072 cubic m

= 0.072 × 50

= 3.6 kg

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