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The floor of a rectsngular hall …

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The floor of a rectsngular hall has a perimeter 250 m if the cost painting the four walls at the rate of RS 10 per m2 is 15000 find the height of hall

Posted by Raj Singh 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

Perimeter of rectangular hall = 2(l + b) = 250 m
Total cost of painting = Rs.15000
Rate per m2 = Rs.10
Area of four walls = 2(l + b) h m2 = (250×h) m2
A/q,
(250×h)×10 = Rs.15000
⇒ 2500×h = Rs.15000
⇒ h = 15000/2500 m
⇒ h = 6 m
Thus the height of the hall is 6 m.

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