If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be
A)15 minutes
B)20 minutes
C)30 minutes
D)60 minutes

Question

Quizplus · Accepted Answer

The time of concentration is the time it takes for water to travel from the most distant point in the drainage area to the outlet. Since the entire basin starts contributing at 3 P.M., the time of concentration is the duration from the start of rain at 2 P.M. to 3 P.M., which is 60 minutes.

If It Rains Between 2 P