For a monosized media filter with a particle size of 2.5 mm in diameter, a bed depth of 2 m and porosity of 20%. Water tempeature= 15°C. The treted water flow is 15 gpm/ft? Calculate the water head loss:
A. 0.5 m
B. 1.5 m
C.5.7 m
D. 15 m