A room is
5 m5 m long and
9 m9 m broad. It has one door measuring
2 m2 m by
1.5 m1.5 m and two windows each measuring
1 m1 m by
1 m1 m. The cost of painting the walls of the room at the rate of
BD90BD90 per
m2m2 is
BD29880BD29880. Find the height of the room.