The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: mixture contains alcohol and water in the ratio 4 : 3 . if 5 liters of water is added to the mixture , the ratio becomes 4 : 5 . find the quantity of alcohol in the given mixture .
[EX A]: 10

[EX Q]: Problem: how many multiples of 7 are there between 10 and 100 ( both are inclusive ) ?
[EX A]: 13

[EX Q]: Problem: with both valves open , the pool will be filled with water in 48 minutes . the first valve alone would fill the pool in 2 hours . if the second valve emits 50 cubic meters of water more than the first every minute , then what is the capacity w of the pool ?
[EX A]:
12000 cubic meters