The cost of carpeting a room is Rs120 .Had it's length been 3m less than it was. The cost would have been Rs 105 . Find the length
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let the rate of painting =Rs. x/metre2
∴ Length×breadth×x=Rs.120........(i)
Length×(breadth−4)×x=Rs.100.........(ii)
from equation (i) and (ii)
breadthbreadth−4=120100=65
breadth=24m
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