Two tanks A and B, of constant cross- sectional areas of 10 m2 and 2.5 m2, respectively, are connected by a 5 cm pipe, 100 m long, with f= 0.03. If the initial difference of water levels is 3 m, how long will it take for 2.5 m3 of water to flow from A to B? Considering entry and exit losses, it can be grossly assumed that the flow velocity, in m/s, through the pipe is 1.75√h, where h is in m, taking g = 10 m/sec2; also, may take area of pipe as 2 × 10-3 m2.

Two tanks A and B, of constant cross- sectional areas of 10 m2 and 2.5

1.	Two tanks A and B, of constant cross- sectional areas of 10 m2 and 2.5 m2, respectively, are connected by a 5 cm pipe, 100 m long, with f= 0.03. If the initial difference of water levels is 3 m, how long will it take for 2.5 m3 of water to flow from A to B? Considering entry and exit losses, it can be grossly assumed that the flow velocity, in m/s, through the pipe is 1.75√h, where h is in m, taking g = 10 m/sec2; also, may take area of pipe as 2 × 10-3 m2.
A.	535 seconds
B.	516 seconds
C.	485 seconds
D.	467 seconds
Answer» E.