A centrifugal pump having an overall efficiency of $75 \%$ requires $6 \mathrm{~kW}$ power at $1450 \mathrm{rpm}$ to deliver water against a suction head of $5 \mathrm{~m}$ and a delivery head of $12 \mathrm{~m}$. If the pump runs at 1650 rpm and frictional head losses are negligible, the total head developed by the pump in metres will be
(A) 22.01
(B) 25.05
(C) 29.35
(D) 31.72
A centrifugal pump having an overall efficiency of $75 \%$ requires $6 \mathrm{~kW}$ power at $1450 \mathrm{rpm}$ to deliver water against a suction head of $5 \mathrm{~m}$ and a delivery head of $12 \mathrm{~m}$. If the pump runs at 1650 rpm and frictional head losses are negligible, the total head developed by the pump in metres will be
(A) 22.01
(B) 25.05
(C) 29.35
(D) 31.72