Question

A swimming pool is 15m in length, 10m in breath and 4m in depth. Find the cost of cementing it at Rs.45 per m2 .​

Answer 1

Step-by-step explanation:

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>>A swimming pool is 20m in length, 15m in

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A swimming pool is 20m in length, 15m in breadth and 4m in depth. Find the cost of Painting its four walls at the rate of Rs. 20 per spuare metre.

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Solution

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Given length of swimming pool =20m

Breadth of swimming pool =15m

Height of swimming pool =4m

Curved surface area of cuboid =2(l+b)h

=2[20+15]×4

=2×35×4

CSA of cuboid (pool)=280m

2

If cost of painting is =20 Rs/sq. m

then cost of painting four walls of pool =20×280

Cost =5600Rs.

Hence cost of painting four walls of swimming pool is Rs. 5600.

Answer 2

Given:-

• Length = 15m
• Breadth = 10m
• Depth = 4m

Note:-

Surface area = 2h(l + b) + l×b

Solution:-

Surface area = 2 × 4(15+10) + 15 × 10

Surface area = 350m²

Finding the cost of cementing it:

=> 350 × 45

=> ₹15,750 (Ans)