A tubewell of 30 cm diameter penetrates fully into an artesian aquifer. The strainer length is 15 m. The yield from the well under a drawdown of 3 m through the aquifer consisting of sand of effective size of 0.2 mm and coefficient of permeability of 50 m / day, with radius of drawdown of 150 m, is nearly

A tubewell of 30 cm diameter penetrates fully into an artesian aquifer

1.	A tubewell of 30 cm diameter penetrates fully into an artesian aquifer. The strainer length is 15 m. The yield from the well under a drawdown of 3 m through the aquifer consisting of sand of effective size of 0.2 mm and coefficient of permeability of 50 m / day, with radius of drawdown of 150 m, is nearly
A.	240 l / s
B.	120 l / s
C.	24 l / s
D.	12 l / s
Answer» D. 12 l / s