Question

find the cost of painting the walls of a room if the room is 4m50cm high and each side of the room is 6 m long at the rate of rs10/m

Answer 1

surface area= 2(l+b)h
=2(6+6)4.5
=2*12*4.5
=108

cost= 108*10
C=RS.1080

cost is RS.1800

Answer 2

area of four walls= 2h (l+b)
=2×4.50 (6+6)
=9×12
=108m^2
cost per m^2=rs 10
total cost = 108×10 =rs 1080
hope it helps