If the diameter of the cross-section of a wire is decreased by 5%, how much per cent will the length be increased so that the volume remains the same?
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Given, the diameter of a cross-section of the wire is decreased by$5\% $. If the volume remains the same then we have to find the percentage increase in the length of the wire. Answer- The length should be increased $10.8\% $ so that the volume remains the same. The height of the hollow cylinder is 12 cm
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