9.) Find the cost of flooring a square room with one side 5m at the rate of Rs 12.50
per sq.m by steps
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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 = 510
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8.5. =60m 2
⇒ Area of the room = l×b
⇒ 60=8×b
∴ b= 60
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8 =7.5m.
∴ Breadth of the room is 7.5m.
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