Question

A cargo plane flew to the maintenance facility and back. It took

one hour less time to get there than it did to get back. The
average speed on the trip there was 220 mph. The average speed
on the way back was 200 mph. How many hours did the trip
there take?
The trip took
hours.

Answer 1

21 hrs

Explanation:

Speed w/out wind

d/220 + 1 = d/210

1 = d/210 - d/220

1/d = 1/210 - 1/220

d = 4620 m

4620 m / 220 m/hr = 21 hrs to get there