Question

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​

Answer 1

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 2

Answer:

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