Question

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of *7.50 per m.​

Answer 1

Answer:

Length of room = 5m

breadth of room=4m.

height of room=3m

cost = rate × area

Cost= 7.50 × area of four walls + area of ceiling

cost= 7.50×2(L+b)×h+L×b

cost=7.50 × 2(5+4)× 3+ 5×4

cost=7.50×2 × 3+20

cost=55