Multiple choice

A volume of 3.0 x 106 m3 of groundwater was pumped out from an unconfined aquifer, uniformly from an area of 5 km2. The pumping lowered the water table from initial level of 102 m to 99 m. The specific yield of the aquifer is

  1. 0.20

  2. 0.30

  3. 0.40

  4. 0.50

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A Correct answer
Explanation