Question

The perimeter of the floor of a hall is 250 m. If the height is 4 m, find the cost of painting the four walls at the rate of Rs. 12 per square meter.

Answer 1

we know that the lateral surface area of a cuboid(room) is perimeter of base multiplied by height=2(l+b)*h.
given perimeter of floor is 250m
and height is 4m
so l.s.a. is 250*4=1000m
cost of painting 1 square metre=rs 12
cost of painting 1000 square metre=1000*12=rs12000

Answer 2

Answer:

we know that the lateral surface area of a cuboid(room) is perimeter of base multiplied by height=2(l+b)*h.

given perimeter of floor is 250m

and height is 4m

so l.s.a. is 250*4=1000m

cost of painting 1 square metre=rs 12

cost of painting 1000 square metre=1000*12=rs12000