if the total cost of flooring a room at rupee 8 per m is rupee 560 and the length of the room 10 m,find its breadth (the answer is 7m how it comes)
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Cost of flooring per square meter = Rs.8.50
⇒ Total cost of flooring of room = Rs.510
∴ Area of the room =
8.50
510
=60m
2
⇒ Area of the room = l×b
⇒ 60=8×b
∴ b=
8
60
=7.5m.
∴ Breadth of the rioom is 7.5m
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