4.The cost of carpeting a square hall is Rs.225 at the rate of Rs.5 per meter sq.find out the area of the hall.
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7.5m
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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