Question:medium

A centrifugal fan rotating at \(500~\mathrm{rpm}\) delivers \(70~\mathrm{m^3/s}\) of air. If the speed is reduced to \(200~\mathrm{rpm}\), the quantity of air delivered in \(\mathrm{m^3/s}\) will be

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Fan affinity laws: \[ \boxed{ Q\propto N,\qquad P\propto N^2,\qquad \text{Power}\propto N^3. } \]

Updated On: Jul 14, 2026

\(175\)
\(55\)
\(28\)
\(11\)

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The Correct Option is C

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