5. A swimming pool is 50 m in length, 30 m in breadth and 2.5 m in depth. Find the cost i am doing of cementing its floor and walls at the rate of 27 per square metre.
The floor of a rectangular hall has a perimeter 236 m. Its height is 4.5 m. Find the cost.
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Answer:
Given
Length of swimming pool = 50m
Breadth of swimming pool = 30m
Depth (Height) of swimming pool
=
2.5m
Now
Area of floor
=
50×
30=
1500m
2
Area of four walls
=
2(50+
30)×
2.5=
160×
2.5=
400m
2
So, the total area to be cemented
=
1500m
2
+
400m
2
=
1900m
2
Now, cost of cementing
1m
2
=
Rs 27
Hence
Cost of cementing
1900m
2
=
Rs 27×
1900=
Rs 51300
Step-by-step explanation:
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