Question

A rectangular room is 6m long, 5m wide and 3.5m high. It has 2 doors of size 1.1m by 2m and 3 Windows of size 1.5m by 1.4m. Find the cost of white washing the walls and the ceiling of the room at the rate of rs 5.30 per sq. m

Answer 1

given-
length of room=6m
breadth=5m
height=3.5m

area of the room=2(lb+bh+lh)
=2 (6x5+5x3.5+3.5x6)
=2(30+17.5+21)
=2(68.5)
=137m square
area of 3 window=6.3 m sq

area of 2 doors=46 m sq 

now subtractining these area from total area=137 -52.3=84.7 m sq