5. A beam 9 m long, 50 cm wide, and 20 cm deep is made of wood which weighs 30 kg per m , find the weight of the beam
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5. A beam 9 m long, 50 cm wide, and 20 cm deep is made of wood which weighs 30 kg per m , find the weight of the beam
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The beam has a shape of a cuboid.
Volume of a cuboid of length l, breadth b and height h =l×b×h
So, the volume of the beam =9×0.4×0.2=0.72m
3
Hence, the weight of the beam if the iron weighs 50kg per m
3
=0.72×50=36kg
Answer:
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