Question

If the length, breadth and height of a room are 6 m, 5 m and 3 m, respectively, what will

be the cost of white washing the walls of the room and the ceiling at the rate of Rs.6 per

square meter?

Answer 1

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Here is the solution:

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Find the area of the ceiling:

Area = Length x Breadth

Area = 6 x 5 = 30 m²

Find the area of the 4 walls:

Area = (Length + Length + Breadth + Breadth) x height

Area = (5 + 5 + 4 + 4 ) x 3

Area = 54 m²

Find the total area:

Total area = 30 + 54 = 84 m²

Find the cost of white washing:

1 m² = Rs 6

84 m² = 6 x 84 = Rs 504

Answer: The cost is Rs 504