GIVEN :

$78$ HP OUT MTR

Disp. Choice

$2610$ RPM OUT MTR

$95\%$ VOL EFF PUMP AND MOTOR

$94\%$MECH EFF PUMP AND MOTOR

$3500$ PSI CONT, $5000$ PSI INT.

$1900$ PRIME MOVER RPM

$89\%$ VOL EFF CHARGE PUMP

$94\%$ MECH EFF CHARGE PUMP

$1\mathrm{.}28$ CU IN$/$REV DISP CHARGE PUMP

$220$ PSI CHARGE PRESSURE

$3\mathrm{.}3$

$3\mathrm{.}9$

$4\mathrm{.}6$

$5\mathrm{.}4$

$7\mathrm{.}6$

$10\mathrm{.}7$

$20\mathrm{.}3$

$29\mathrm{.}3$

FIND: $=\frac{\text{T}\text{h}\text{e}\text{c}\text{t}\text{e}\text{q}6\mathrm{.}28}{\text{P}\text{S}\text{I}}$

RPm OUT MTR $2610$ RPm

$65$