Question

A room 5m by 4m by 3 m has a marble flooring . Its walls and ceilings have been painted light blue. Find the cost of marbling the floor at the rate of rs 200 per sq m and painting the walls and ceilings at the rate of rs 50 per sq m

Answer 1

Area of floor =l*b
=5m*4m
=20m square.
cost of 1m square marble in room=200rupee
cost of 20m square marble in room=200*20
=4000 rupees
now area of four walls =(2(l+b)h)
=(2(5m+4m)3)
=54m square
cost of 1m square paint=50rupees
cost of 54m square paint =50*54
=2700rupees.
I hope this answer is correct