a swimming pool is 20m in length 15 metre in breadth and 4m and depth find the cost of cementing its four wall and floor @ ₹ 5 also find the water required to fill swimming pool completely.
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Step-by-step explanation:
Lenght = 20m
Breadth= 15m
Height (depth) = 4m
Area of four wall = 2( l + b )h
= 2 (20 + 15)4
= 2*35*4
= 280m²
Area of floor = 2( l + b )
= 2 ( 20 + 15 )
= 2*35 =70m²
Total area to be cemented = 280 + 70 = 350m²
Total coast of cementing = 5*350 = Rs.1750
Water required to fill the pool completely = Volume of the pool
Volume of the pool = lbh
= 20*15*4 =1200m³
Water required to fill the pool = (1200 * 1000)liters
1200000 liters = 1200kiloliters
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