SOLUTION: A plane driver was needed at the production site of a SYFY movie. The average speed of the plane driver's flight to the site was 160 mph, and the average speed of the return trip

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Question 1197016: A plane driver was needed at the production site of a SYFY movie. The average speed of the plane driver's flight to the site was 160 mph, and the average speed of the return trip was 120 mph. Find the distance of the round trip if the total flying time was 7 h.

This question = how many miles_______?

Found 2 solutions by ewatrrr, josgarithmetic:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi  
The average speed of the plane driver's flight to the site was 160 mph, 
and the average speed of the return trip was 120 mph
Find the distance of the round trip if the total flying time was 7 hr
D =rt   ***Distance is the same to and from:
Let t be time at 120mph then (7-t) would be time at 160mph
 160(7-t) = 120t
   40t = 160
     t = 4hr, time at 120mph
  Distance = 4h * 120mph = 480mi

Wish You the Best in your Studies.


Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Only a little different from the other question.

https://www.algebra.com/algebra/homework/equations/Equations.faq.question.1196999.html
                SPEEDS          TIMES            DISTANCE

GOING TO          160           d/160              d

RETURN            120           d/120              d

TOTAL                            7

Solve for d, in d%2F160%2Bd%2F120=7.

LCD=3%2A4%2A4%2A10
-
3%2A4%2A4%2A10%28d%2F160%2Bd%2F120%29=3%2A4%2A4%2A10%2A7
3d%2B4d=480%2A7
7d=480%2A7
highlight%28d=480%29