human
Bob runs 6 miles per hour. His friend Jim runs at 9 miles per hour. If Bob has a 1 mile head-start, how many minutes will it take before Jim catches him?
assistant
How many miles does Bob run in a minute? ** Bob runs .1 miles per minute because 6 / 60 = <<6/60=.1>>.1
How many miles does Jim run in a minute? ** Jim run at .15 miles per minute 9 / 60 = <<9/60=.15>>.15
How many minutes does it take Jim to catch Bob? ** We know that .1(Number of Minutes) + 1 = .15(Number of Minutes)
How many minutes does it take Jim to catch Bob? ** Therefore 1 = .05(Number of minutes)
How many minutes does it take Jim to catch Bob? ** Therefore (Number of minutes) = 20 because 1 / .05 = <<1/.05=20>>20
#### 20