instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: the malibu country club needs to drain its pool for refinishing . the hose they use to drain it can remove 60 cubic feet of water per minute . if the pool is 60 feet wide by 100 feet long by 10 feet deep and is currently at 80 % capacity , how long will it take to drain the pool ?
answer:
800


question:
Problem: a man is 28 years older than his son . in two years , his age will be twice the age of his son . the present age of the son is ?
answer:
26


question:
Problem: a man swims downstream 72 km and upstream 45 km taking 6 hours each time ; what is the speed of the current ?
answer:

2.25