Question

Please answer the question no 5,6,7

Answer 1

5. Length= 50m
Breadth=30m
Depth=2.5m

As the swimming will be open from top,so only 5 sides will be cemented.

$area = 2(lb + bh + lh) - lh \\ = 2((50 \times 30) + (30 \times 2.5) + (50 \times 2.5)) - (50 \times 2.5) \\ = 2(1500 + 75 + 125) - 125 \\ = 2(1700) - 125 \\ = 3400 - 125 \\ = 3275 {m}^{2}$
Now,Rate of cementing the wall = Rs27/m²
Cost = Rs 27 × 3275
= Rs 88,425

Hope you got the answer.
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