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Q. |
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 |
Answer» D. 60 minutes |
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