Question

please help me i will mark as brainlist

Answer 1

Given the length of the room = 5m.

Given the breadth of the room = 4m.

Given the height of the room = 3m.

Now,

Area to be white-washed = 2lh + 2bh + l * b

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

                                           = 30 + 24 + 20

                                           = 74m^2.



Given the cost of white-washing per m^2 = 7.50.

Therefore, the cost of white-washing 74m^2 = 74 * 7.50

                                                                           = 555.


Therefore the total cost of white-washing = 555.



Hope this helps!