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Question 60
A room is in the shape of a cuboid, with dimensions 12 m $$\times$$ 10 m $$\times$$ 3 m. What is the cost of painting the four walls of the room at the rate of ₹50 per m$$^2$$?
Solution
Area of the 4 walls = 2(l + b)h = $$2(12 \times 3 + 10 \times 3)$$ = 132
Cost of painting = 132 $$\times$$ 50 = 6600
So, the answer would be option c)₹6600
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