Two airplanes left the same airport traveling in opposite directions. If one airplane averages 400 miles per hour and the other airplane averages 250 miles per hour, in how many hours will the distance between the two planes be 1625 miles?
1 Answer
Time taken
Explanation:
Did you know you can manipulate units of measurement
in the same way you do numbers. So they can cancel out.
distance = speed x time
The speed of separation is 400 + 250 = 650 miles per hour
Note that 'per hour' means for each of 1 hour
The target distance is 1625 miles
distance = speed x time
Multiply both sides by
Time taken