Kaplan turbine, running at speed of $90$ rpm under an operating head of $16$m and

discharge of $600$m$3/$s$,$ develops $60$MW$.$ Determine the valves of unit speed, unit

discharge, unit power and specific speed of the turbine, having its diameter as $10$m$.$ If the

critical value of the cavitation coefficient is $0\mathrm{.}90,$ what should be the location of the tail

race? Take vapour pressure of water as$25$KN$/$m