Question

The length, width 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 Php 7.50 per m2.

Answer 1

Answer:

705rupees

Step-by-step explanation:

surface area of cuboid =2(lb+bh+hl)

2(4×5+4×3+3×5)

=94m^2

1 m^2 cost is 7.50 rupees than 94m^2 cost is

94×7.50

=705 rupees

Answer 2

Area to be white washed does not include the floor

Therefore,area to be white washed

=Area of four walls+Area of ceiling

=2(l+b)×h+l+b

=2(5+4*3+5*4)m

=54+20m^2

=74m^2

Cost of whitewashing=Rs 7.50 *74 =Rs 555