- 02 Apr '05 21:19

I don't think it matters.*Originally posted by THUDandBLUNDER***When a man drives his car from town A to town B he drives at 72mph downhill and at 56mph uphill.**

Using the times taken for both legs of the journey, when he returned home he was able to calculate the distance between the two towns.

How fast does he drive on the flat? - 03 Apr '05 01:14 / 1 edit
*Originally posted by jimslyp69***By on the flat do you mean flat out as in 'full whack'? Must be 72mph in that case if that's what he is doing downhill.**

Otherwise i think this question is very ambiguous and there is not enough information to find out half the answer.*Very*ambiguous? Thank you very much!

I mean that there are three types of road: uphill, downhill, and flat.

Bu it is unknown how much of each there is. - 03 Apr '05 02:53

It still wouldn't matter. As long as his speed is the same on the flat in both directions, the time spent on the flat is equal both coming and going and can be subtracted out of the total time for his calculating purposes.*Originally posted by Bowmann***What if it were 0mph?**

If the speed on the flat is 0, then for him to have made the trip (as stated in the original problem), there would have to be no flat stretches in his journey. - 03 Apr '05 03:43

There's no explaination. He's just being stupid as usual.*Originally posted by TDR1***if he isnt moving how can he reach his destination?? explain that please.**

I apoligise if you were being serious, but I don't see any way that could be true. If he were to ever reach his destination, his speed on the flat couldn't be zero unless there was no flats. And no, he wouldn't get there eventually traveling at speed zero. - 03 Apr '05 03:53

The times spent going uphill, downhill, and flat are non-zero but unknown.*Originally posted by The Plumber***As long as his speed is the same on the flat in both directions, the time spent on the flat is equal both coming and going and can be subtracted out of the total time for his calculating purposes.**

We know only the uphill speed, downhill speed, and total time for each whole trip. - 03 Apr '05 06:53

Actually, we only know two of the three.*Originally posted by THUDandBLUNDER***The times spent going uphill, downhill, and flat are non-zero but unknown.**

We know only the uphill speed, downhill speed, and total time for each whole trip.

We know only the uphill speed, downhill speed,**and total time for each whole trip.**

we do not know the 3rd point (bolded)