The dimensions of a room are 25 feet 15 feet 12 feet What is the cost of white washing the four wall...........

Quantitative Aptitude ( CCS) Mensuration 3D

The dimensions of a room are 25 feet * 15 feet * 12 feet. What is the cost of white washing the four walls of the room at Rs. 5 per square feet if there is one door of dimensions 6 feet * 3 feet and three windows of dimensions 4 feet * 3 feet each?

Rs. 4800

Rs. 4856

Rs. 4530

none of these

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Explanation:

Area of the four walls = 2h(l + b)
Since there are doors and windows, area of the walls = 2 * 12 (15 + 25) - (6 * 3) - 3(4 * 3) = 906 sq.ft.
Total cost = 906 * 5 = Rs. 4530

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