Question $(2)$:

a$-$ Water with a flow rate of $4f\frac{t^3}{s}$ is pumped. The diameter of a discharge pipe of a pump is $8$ in $.$ and that of intake is $10$ in $.$ The pressure gauge at discharge is $32$ psi. and that at intake is $-5\mathrm{.}9l\frac{b_f}{f}{t}^2.$ If the pump power is $49$ hp $.$ calculate the eliciency of pump assuming that the intake and discharge of pump are at the same elevation and the friction losses is neglected. $(1in-0\mathrm{.}0833$ Ii$)$