2 swimmers start at opposite ends of a 90ft pool one swims 30ft per min the other swims 20ft per min if they s

Question

2 swimmers start at opposite ends of a 90ft pool one swims 30ft per min the other swims 20ft per min if they swim for 30min how many times will they meet

Answer 1

The swimmer at 20 fpm takes 4 minutes 30 seconds to travel the length of the pool. This means 6 and 2/3 trips across the pool in 30 minutes. The swimmer at 30 fpm takes 3 minutes to travel the length of the pool. This would be 10 trips in 30 minutes. Add the 2 together and they will meet 17 times.