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A motor is used to deliver water at a certain rate through a given horizontal pipe. To deliver n-times the water through the same pipe in the same time the power of the motor must be increased as follows :

\[\begin {array} {1 1} (a)\;n-times & \quad (b)\;n^2-times \\ (c)\;n^3-times & \quad (d)\;n^4-times \end {array}\]
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answered Nov 7, 2013 by pady_1

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