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An airline passenger is planning a trip that involves three

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An airline passenger is planning a trip that involves three [#permalink] New post 05 Nov 2017, 23:14
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An airline passenger is planning a trip that involves three connecting flights that leave from airports A, B and C, respectively. The First flight leaves Airport A every Hour, beginning at 8:00 a.m., and arrives at Airport B 2nd a half hours later. The second flight leaves Airport B every 20minutes, beginning at 8:00a.m, and arrives at Airport C 1h 10 minutes later. The third flight leaves Airport C every hour, beginning at 8.45 a.m. What is the least total amount of time the passenger must spend between flights if all flights keep to their schedules?

A. 25 min
B. 1hr 5 min
C. 1hr 15 min
D. 2hr 20 min
E. 3hr 40 min

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[Reveal] Spoiler: OA
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Re: An airline passenger is planning a trip that involves three [#permalink] New post 20 Nov 2017, 13:23
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The passenger will start from Airport A at 8 A.M. and reach Airport B at 10:30 A.M..Given that the second flight leaves Airport B every 20 minutes beginning at 8:00a.m, so the passenger will catch flight at 10:40 A.M. from Airport B.Therefore, stay duration for the passenger at airport B is 10 minutes.

The passenger will reach Airport C at 11:50 A.M..Given that the third flight leaves Airport C every hour, beginning at 8.45 a.m , so the passenger will catch flight at 12:45 P.M.Hence, stay duration for the passenger at airport C is 55 minutes.

Answer: The least total amount of time the passenger must spend between flights if all flights keep to their schedules is 1 hour 5 min. (10 Min Airport B+ 55 Min Airport C). Option B.
Re: An airline passenger is planning a trip that involves three   [#permalink] 20 Nov 2017, 13:23
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An airline passenger is planning a trip that involves three

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