A beam 11m long, 40 cm wide and 30 cm deep is made of wood which weighs 25 kg per m³. Find the weight of the beam.
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Length of cuboidal beam = 11m
Breadth of cuboidal beam = 40 cm or 0.4 m [∵ 1 cm = 1/100 m]
Height of cuboidal beam = 30 cm or 0.3 m [∵ 1 cm = 1/100 m]
∵ Volume of cuboid = Length × Breadth × Height
Volume of cuboidal beam = 11m × 0.4m × 0.3m
= 1.32 m³
Given that 1 m³ weigh = 25 kg
∴ Weight of 1.32 m³ = 1.32 × 25
= 33 kg
Hence weight of given cuboidal iron beam = 33 kg
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