SOLUTION: Peggy drives to town at a rate of 40 km/h. How fast must she drive in order to average 80 km/h for the entire trip?

Question 1152049: Peggy drives to town at a rate of 40 km/h. How fast must she drive in order to average 80 km/h for the entire trip?
Found 2 solutions by ikleyn, Alan3354:
Answer by ikleyn(52765) (Show Source): You can put this solution on YOUR website!
.

The statement to the problem is INCOMPLETE.

With such uncompleted statement, the solution IS NOT POSSIBLE.

You missed part of the problem's formulation in your post, UNFORTUNATELY.

So, double check your post, comparing with the source.

When you will find the missed part, re-write your post and submit it to the forum again.

Please do not submit it to me personally.

Thanks.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Peggy drives to town at a rate of 40 km/h. How fast must she drive in order to average 80 km/h for the entire trip?
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If by "entire trip" you mean there and back:
---
A round trip at 80 takes the same amount of time as one-way at 40.
Time is up.
She cannot average 80 for the round trip.
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If the "entire trip" is not 2 segments of the same length, you'll have to supply more info.

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