vinay1983 wrote:One hour after Yolanda started walking from X to Y, a distance of 45 miles, Bob started walking along the same road from Y to X. If Yolanda's walking rate was three miles per hour and Bob's was four miles per hour, how many miles had Bob walked when they met?
1) 24
2) 23
3) 22
4) 21
5) 19.5
In the first hour, the distance walked by Yolanda alone = 3 miles.
Remaining distance between Bob and Yolanda = 45-3 = 42 miles.
Bob's rate : Yolanda's rate = 4:3.
Implication:
When Bob and Yolanda walk toward each other, of every 7 miles, Bob walks 4 miles, while Yolanda walks 3 miles.
Thus, Bob will walk 4/7 of the remaining 42 miles:
(4/7) * 42 = 24.
The correct answer is
A.
Side note:
Don't either of them own a car?
Last edited by
GMATGuruNY on Thu Sep 26, 2013 2:38 am, edited 1 time in total.
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