A chemical plant has four tanks (A, B, C and D), each containing 1000 liters of a chemical. The chemical is being pumped from one tank to another as follows: From A to B at 20 liters/minute From C to A at 90 liters/minute. From A to D at 10 liters/minute From C to D at 50 liters/minute. From B to C at 100 liters/minute From D to B at 110 liters/minute. Which tank gets emptied first and how long does it take (in minutes) to get empty after pumping starts ?

A chemical plant has four tanks (A, B, C and D), each containing 1000

1.	A chemical plant has four tanks (A, B, C and D), each containing 1000 liters of a chemical. The chemical is being pumped from one tank to another as follows: From A to B at 20 liters/minute From C to A at 90 liters/minute. From A to D at 10 liters/minute From C to D at 50 liters/minute. From B to C at 100 liters/minute From D to B at 110 liters/minute. Which tank gets emptied first and how long does it take (in minutes) to get empty after pumping starts ?
A.	A, 16.66
B.	C, 20
C.	D, 20
D.	D, 25
Answer» D. D, 25