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

Question 1197124: A stunt driver was needed at the production site of a Hollywood movie. The average speed of the stunt 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.
Is how many miles for the whole round trip_____?
Found 4 solutions by ewatrrr, greenestamps, josgarithmetic, Alan3354:
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi Let t represent time to the site: Distance to and from are the same: d=rt 160t = 120(7-t) t = 120*7/280 = 3hr 160mph*3hr =480mi and 120mph*3hr = 480mi Total Trip: 960mi Wish You the Best in your Studies.

Answer by greenestamps(13198)   (Show Source): You can put this solution on YOUR website!

Informally....

The distances going and returning are the same, and the ratio of the speeds is 160:120 = 4:3; that means the ratio of the times at the two speeds is 3:4.

Then, since the total time was 7 hours, that means he spent 3 hours at 160mph on the way there and 4 hours at 120mph on the way back.

ANSWER: round trip distance = 160*3 + 120*4 = 480+480 = 960 miles

Answer by josgarithmetic(39616)   (Show Source): You can put this solution on YOUR website!
The ROUND TRIP total distance, find.

G=160, speed going
R=120, speed returning
T=7, total time traveling
x, unknown time for Going-To

WHICH WAY SPEED TIME DISTANCE Going G x Gx Return R T-x R(T-x) Total T

Distance each way same;

-

Substitute the given values and evaluate x, and then evaluate .

-

----------full round-trip distance
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
A stunt driver was needed at the production site of a Hollywood movie. The average speed of the stunt 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.
---------------
Avg speed of a round-trip is
Avg speed = 2*160*120/280 = 960/7
d = r*t = (960/7)*7 = 960 miles
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