what length of canvas cloth,which is 3m wide,is used to make a conical tent 10m in diameter and 4.2m in slant height?find the cost of the canvas cloth at the rate of rs 2.50 per m
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cost = area x rate
= πrl/3 x 2.5
=22/7xd/2x4.2/3x2.5
= πrl/3 x 2.5
=22/7xd/2x4.2/3x2.5
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