j*******y
发帖数: 105 | 1 不记得从那个版看的了。But here is it anyway, hope somebody can shed a light.
Trip from A to B and back. Uphill speed is X, flat speed is Y, downhill
speed is Z. A to B takes P time, B to A takes Q time. What's the distance
between A and B?
这道题是不是缺条件呀? I think there is more variables than equations, right?
Thanks | p*****w
发帖数: 82 | 2 You have everything there, hehe | h**********k
发帖数: 168 | | j*******y
发帖数: 105 | 4 hmmm..., so I am not getting it.怎么解呀? | S*****H
发帖数: 90 | 5 Suppose X=1, Y=2, Z=3 and P=Q=8
Then the total distance can be 12 (6 miles up and 6 miles down,
no flat) or 16 (all flat).
So jersey boy is right: 缺条件. | g*****y
发帖数: 1120 | 6 suppose p>q:
(p-q)*(z-x) = up hill distance |
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