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 35 per m^2.

with explanation plz...​

Answer 1

Answer:

Step-by-step explanation:

Surface Area of Floor = Length x Breadth = 20 * 15 =  300 m2

There will be 4 walls in a swimming pool

Surface Area of Wall 1 along length = 20 * 4 = 80 m2

Surface Area of Wall 2 along length = 20 * 4 = 80 m2

Surface Area of Wall 3 along breadth = 15 * 4 = 60 m2

Surface Area of Wall 4 along breadth = 15 * 4 = 60 m2

Total surface area to be cemented = 300 + 80 + 80 + 60 + 60 = 580 m2

Cost of cementing = 580 x 35 = Rs 20,300

Answer 2

Answer:

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