# Two water tanks are being set up. Each one starts with 100 liters of water. The first tank fills at a rate of 15 liters per minute. The second one fills at the rate of 20 liters per minute. When will the first tank contain 7/3 as much as the second tank?

## Possible Answers A. 5 minutes B. 6 minutes C. 7 minutes D. 8 minutes

Jul 6, 2018

Something wrong with the question. The first tank can not be $\frac{7}{3}$ of the second when the second fills faster.

#### Explanation:

The first tank at 15 L/m can never have more than the second tank at 20L/m. Thus your question is the wrong way round.

Either the first tank is $\frac{3}{7}$ of the second and the filling rate is as in the question.

Or it is the first tank that fills at 20L/m and the second at 15L/m

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