Question

The length breadth and the height of a room are 5m 4m and 3m respectively. Find the cost of the whitewashing the ceiling at the rate of Rs.12 per m^2 and the four walls at the rate of Rs.10 per m^2

Answer 1

L= 5m

B=4m

H=3m

Area of ceiling = L×B

=5×4 = 20m^2

Cost of whitewashing isRs 12 per m^2

20×12=Rs.240

Area of four walls =2(L+B)×H

2(5+4)×3

2(9)×3

=54m^2

Cost of whitewashing four wall is RS.10 per m^2

54×10

=RS.540