A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of

1.	A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of repairing the floor and wall at the rate of Rs. 25 per square metre.
Answer» Given, Dimensions of swimming pool are = 20 m × 15 m ×3 m Where, Length = 20 m , Breadth = 15 m , Height = 3 m Then, Area of floor & walls of swimming pool = l x b + 2(l x h + b x h) = 20 x 15 + 2(20 x 3 + 15 x 3) = 300 + 2(60 + 45) = 300 + 210 = 510 m² So, Cost of repairing 1 m² area = Rs.25 ∴ Cost of repairing 510 m² = 510 x 25 = Rs. 12750

A swimming pool is 20 m long 15 m wide and 3 m deep. Find the cost of repairing the floor and wall at the rate of Rs. 25 per square metre.

Answer»

Given,

Dimensions of swimming pool are = 20 m × 15 m ×3 m

Where,

Length = 20 m , Breadth = 15 m , Height = 3 m

Then,

Area of floor & walls of swimming pool = l x b + 2(l x h + b x h)

= 20 x 15 + 2(20 x 3 + 15 x 3) = 300 + 2(60 + 45) = 300 + 210 = 510 m²

So,

Cost of repairing 1 m² area = Rs.25

∴ Cost of repairing 510 m² = 510 x 25 = Rs. 12750