Q. A pipe line is 6 km long and having 20 cm diameter connect two reservoir 'A' and 'B'. The rate of discharge in the pipe is 30 lit/sec. Find out the difference in reservoir levels if friction factor f = 0.0008.

• (A) 4.5 mm
• (B) 4.5 cm
• (C) 4.5 m
• (D) 4.5