Question

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

Answer 1

Step-by-step explanation:

Area of the room=2(lb+bh+hl)

=2(5×4+4×3+3×5)

=2(20+12+15)

=2(47)

=94

Area of the room that has to be white washed=

=area of room- area of bottom

=94-l×b

=94-5×4

=94-20

=74

Cost of white washing the walls=94×7.50

=705

Therefore cost of white washing the walls is 705 rupees.

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