Q. 124.2( 5 Votes )

# A swimming pool i

Given,

length (l) = 20 m

breadth (b) = 15 m

depth (d) = 4 m

Total area of walls = 2(bd) + 2(ld)

= 2 d (l+b)

= 2 × 4 (20 + 15)

= 280 m2

Area of base = lb

= 20 × 15

= 300 m2

Total area to be cemented = Area of base + Total area of walls

= 300m2 + 280m2

= 580 m2

cost of cementing = Rs 12 per m2

Total cost of cementing = 12 × 580

= 6960

So, Total cost of cementing of the pool is Rs. 6960

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