Question

The cost of carpeting a square hall at Rs. 60 per m2 is

Rs. 2,94,000. If the cost of plastering its four walls at
Rs. 15 per m2 is Rs. 16,800, find the height of the hall.

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Answer 1

4 m
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Explanation:

• 294000 / 60 = 4900 m2 is the area of the sqaure
• sqrt{4900} = 70 m is the sqaue length (=width)
• 16800 / 15 / 4 = 280 m2 is the area of ONE wall
• 280 / 70 = 4 m is the wall hight