Two geometrically similar pumps are running at 1000 rpm speed (both). If one pump has impeller diameter of 0.3m and discharges 20 LPM against 20 head, and the other pump gives half of this discharges rate; calculate head and diameter of second pump
(A) 12.5 m and 0.12 m
(B) 10.5 m and 0.12 m
(C) 10.5 m and 0.23 m
(D) 12.5 m and 0.23 m