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Q.

The floor of a rectangular hall has a perimeter $15 m$ . If the cost of painting the four wall at the rate of Rs. 10 per $m 2$ is 15000, then what is the height of the hall?

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a

2000 m

b

100 m

c

200 m

d

1000 m

answer is B.

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Detailed Solution

Given- perimeter of the floor of a rectangular hall = 15m.
The cost of painting the four wall at the rate of Rs. 10 per

m 2

= 15000.

Area of four walls = Cost of four walls Rate Area of four walls = 1500010 ∴ Area = 1500 m 2

Also,

Question Image

Thus, the height of the hall is 100m.
Hence, option 2 is the correct option.

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The floor of a rectangular hall has a perimeter 15 m . If the cost of painting the four wall at the rate of Rs. 10 per m 2 is 15000, then what is the height of the hall?