3. Total installed cost of a centrifugal pump coupled with drive and capable of developing 1000 ft head at 500 gpm is to be calculated using Rs. 55000 as the cost of a pump of 500 ft head at 1000 gpm. The cost estimation method involves the term capacity which will be taken as (gpm)x (head)y where
A. x = 1/2 y = 1
B. x = 1 y = 1
C. x = 1 y = 2
D. x = 2 y = 1