Oil, with $sg=0\mathrm{.}87,$ flows from a tank pressurized at $130$ kPa at a rate of $72\frac{L}{s}$ and Calculate the power delivered to the hydraulic motor as shown below if the pressure at

$A$ is $6\mathrm{.}8$ MPa and the pressure at $B$ is $3\mathrm{.}4$ MPa $.$

The motor inlet is a steel hydraulic tube with $25$ mm OD $1\mathrm{.}5mm$ wall $($point $A)$ and the

outlet is a tube with $50$ mm OD $2\mathrm{.}0mm$ wall $($point B

powers a fluid motor as shown. Energy losses due to friction and fittings between the

tank and $B$ are estimated to be $1\mathrm{.}81$ m $.$

If the pressure at B is found to be $-56$ kPa and the motor has an efficiency of $78\%,$

determine the power output from the motor.