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1. |
The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after |
A. | 0 years |
B. | 50 years |
C. | 00 years |
D. | 50 years |
Answer» B. 50 years | |