Question

.
31. A swimming pool is 20 m in length,15 m in breadth and 40 dm in depth Find cost of cementing Its
four walls @ Rs. 27 per m".​

Answer 1

Answer:

Surface area of swimming pool,

= 2(LB+BH+HL)

= 2(20×15+15×40+40×20)

=2(300+600+800)

=2×1700

=3400m^2

Area of white washing,

= Surface area - Area of floor

= 3400 - L×B

= 3400-20×15

= 3400 - 300

=3100m^2

Cost of white washing = 3100×27

= ₹83700