SOLUTION: A submarine traveled to Madagascar and back. It took four hours less time to get there than it did to get back. The average speed on trip there was 14km/h. The average speed on the

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Question 886861: A submarine traveled to Madagascar and back. It took four hours less time to get there than it did to get back. The average speed on trip there was 14km/h. The average speed on the way back was 10km/h. How many hours did the trip there take?
I got 140 hrs which i think is wrong.
Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!
A submarine traveled to Madagascar and back. It took four hours less time to get there than it did to get back. The average speed on trip there was 14km/h. The average speed on the way back was 10km/h. How many hours did the trip there take?
I got 140 hrs which i think is wrong.


Let time to get there be T

Then time taken on return trip is:    T + 4

Distance traveled on trip there is:   14T

Distance traveled on return trip is:  10(T + 4), or 10T + 40

The distances are equal so, 14T+=+10T+%2B+40

14T - 10T = 40

4T = 40

T, or time taken to get there = 40%2F4, or highlight_green%28highlight_green%2810%29%29 hours

You can do the check!!