A swimming pool is 20m in length, 15 m in breadth, and 4 m in depth.Find the cost of cementing its floor and walls at the rate of Rs 12 per square metres.

Volume of swimming pool= 20*15*4 = 1200 m3
1200 m3 = 112.92 m2
1 m2 = 12 Rs
so 112.92 = 112.92*12 = 1355.04 Rs
  • -8
Area of 4 walls of the swimming pool

= 2h (l + b)
= 2*4 (20 + 15)
= 8 * 35
= 280 m2

Area of the floor of the swimming pool

= l * b
= 20 * 15
= 300 m2

TOTAL AREA

= 280+300
= 580 m2

Cost of cementing the swimming pool @ Rs. 12/m

= 580 * 12
= Rs. 6960 


 
  • 7
Area of 4 walls of the swimming pool = 2h (l + b) = 2*4 (20 + 15) = 8 * 35 = 280 m2 Area of the floor of the swimming pool = l * b = 20 * 15 = 300 m2 TOTAL AREA = 280+300 = 580 m2 Cost of cementing the swimming pool @ Rs. 12/m = 580 * 12 = Rs. 6960
  • 4
yes
  • -2
total area = 280 + 300
cost = 580 * 12
6960
 
  • -2
Area of four walls of swimming pool =
2(L+B)H
2(15+20)4
2*35*4
70*4
280 sq

Area of floor =L*B
15*20
300 sq

Total area 280+300=580sq

Cost per sq = 12 RS
580*12=6960 RS
  • 0
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