A Pelton wheel develops 2000 kW under a head of 100 metres while running at 200 r.p.m. and discharging 3000 litres of water per second. The unit discharge of the wheel is:

A

0.8 m$$^3$$/sec

B

0.3 m$$^3$$/sec

C

0.5 m$$^3$$/sec

D

0.6 m$$^3$$/sec