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TO and FRO (Posted on 2016-04-25) Difficulty: 1 of 5
A and B drive from X to Y. A drives the first 40 miles, and B drives the rest of the way.
That afternoon they return by the same route, with A driving the first leg and B driving the last 50 miles.
Who drives the farthest, and by what distance?

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (2 votes)

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Solution | Comment 1 of 4
B drives farther by 20 miles.

Let Q = the distrance between X & Y.
On the first half of the trip A drives 40 and B drives Q-40 miles.
For the second half A drives Q-50 and B drives 50.  Add the totals for A and B.
A drove 40+(Q-50)=Q-10
B drove (Q-40)+50=Q+10

The difference is 20 miles.

  Posted by Kenny M on 2016-04-25 16:39:10
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