a swimming pool is 50 m in length 30 m in breadth and 2.5 m in depth. find the cost of cementing it's floor and walls at the rate rs27 per square metre.
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Cementing its walls and floor means only top is exclude.
So area to be cemented= Area of 4 walls+ Area of the floor
= Lateral surface area of the cuboid + Area of the floor
= 2h(l+b) + lb [Here,we take the depth as the height]
= 2(2.5)(50+30) + 50(30)
=5(80) + 1500
=400+1500
=1900 m2
Cost for cementing= Rs 27(1900) = Rs 51300
Thus,cost for cementing the walls and the floor is Rs 51300
So area to be cemented= Area of 4 walls+ Area of the floor
= Lateral surface area of the cuboid + Area of the floor
= 2h(l+b) + lb [Here,we take the depth as the height]
= 2(2.5)(50+30) + 50(30)
=5(80) + 1500
=400+1500
=1900 m2
Cost for cementing= Rs 27(1900) = Rs 51300
Thus,cost for cementing the walls and the floor is Rs 51300
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