If it takes 5 minutes to fill a 15 litre bucket from a water tap diameter `(a)/(sqrt(pi))` cm then the raynolds number for the flow is (density of water `=10^(3)kg//m^(3)` and viscosity of water `=10^(-3)Pa`.s) close to
A. 11000
B. 5500
C. 550
D. 1100