Irrigation Engineering
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

20 minutes
30 minutes
15 minutes
60 minutes

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Irrigation Engineering
An artesian aquifer is the one where

water surface under the ground is at atmospheric pressure
None of these
water is under pressure between two impervious strata
water table serves as upper surface of zone of saturation

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