Question

A swimming pool is 20 m in length,15 m in breadth,4 m in depth.Find the cost of cementing its floor and walls at 35rs per square meters.


Note: - Answer is 20,300

Answer 1

Answer:

20,300

Step-by-step explanation:

given :-

>> length of the swimming pool = 20m

>> breadth of the swimming pool = 15m

>> height (depth) of the swimming pool = 4m

According to the question, we have to find the cost if cementing it's floor and walls at rs 35 per m² so first we have to find the area to be cemented.

as it's mentioned that we have to find the cost of cementing it's floor and walls, so we will use CSA + 1 base formula.

CSA = curved surface area (four walls)

1 base = base ( floor of the swimming pool )

CSA + 1 base of the swimming pool = 2h ( l + b ) + lb

= 2 × 4 ( 20 + 15 ) + ( 20 × 15 )

= 8 ( 35 ) + 300

= 280 + 300

= 580m²

hence, cost of cementing at rs 35 per m² = 35 × 580 = rs 20300