A Pelton wheel $2\mathrm{.}5$m diameter operates under the following conditions:

Net head available $=300$m

Speed $=300$ rpm

Coefficient of velocity of the jet $=0\mathrm{.}98$

Blade friction coefficient$=0\mathrm{.}95$

Diameter of the jet $=20$ cm

Mechanical efficiency $=0\mathrm{.}95$

Determine: $($i$)$ the power developed $($ii$)$ hydraulic efficiency