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A swimming pool is 20 m in length, 15 m in breadth and 4 m in depth. Find
the cost of cementing its walls and floor at the rate of * 5 per m². Also, find
the water required to fill the swimming pool completely.
Answers
Answer:
Rs6960
Step-by-step explanation:
Given that,
Length of the swimming pool is, l = 20 m
Breadth of the swimming pool is, b = 15 m
Height of the swimming pool, h = 4 m
To find,
The cost of cementing its floor and walls at the rate of Rs.12 per square metre.
Solution,
The surface area of cuboid to be cemented is given by :
The surface area of the cuboid = area of 4 walls + area of floor
The surface area of the cuboid = Lateral surface area of cuboid + area of floor
The surface area of the cuboid is
\begin{gathered}2h(l+b)+lb\\\\=2\times 4\times (20+15)+20\times 15\\\\=580\ m^2\end{gathered}
2h(l+b)+lb
=2×4×(20+15)+20×15
=580 m
2
For Rs.12 per square metre,
\begin{gathered}A=\text{Rs} 580\times 12\\\\A=\text{Rs}\ 6960\end{gathered}
A=Rs580×12
A=Rs 6960
So, the cost of cementing its floor and walls at the rate of Rs.12 per square metre is Rs 6960.
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