Question

A helicopter leaves an airport and flies south at 180 mi/h. Thirty minutes later, an airplane leaves the airport and follows the same route as the helicopter, only at a higher elevation. The airplane is flying 330 mi/h. How many minutes will it take for the airplane to catch up with the helicopter? (Hint: 30 minutes is 12 hour.)

Answer 1

36 minutes

Explanation:

helicopter 1 is ahead of helicopter 2 by 90 miles

the difference in their speeds is 150 mph

90/150=3/5 of hour

3/5*60=36 minutes