a swimming pool is 20m in length, 15 in breadth and 4m in depth. Find the cost of cementing its wall and floor at rate of rupees 5 per metre square. Also, find the water required to fill the swimming pool completely.
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Given:
Length,l =20m
Breadth, b= 15m
Height,h = 4m
Cost of cementing its wall and floor
= Rs 5 × LSA of cuboid + area of floor
= Rs 5 × 2(l+b)h + lb
= Rs 5 × 2(20+15)×4 + 20× 15
=Rs 5 × 2× 35× 4 +300
=Rs 1400+300
= Rs 1700
Water required to fill the swimming pool completely:
= Volume of cuboid
= l×b×h
=20m×15m×4m
=1200m³
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