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# Luke drives the first 300 miles of a trip at 60 miles an hou

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Joined: 20 May 2014
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Luke drives the first 300 miles of a trip at 60 miles an hou [#permalink]  04 Dec 2017, 03:12
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Luke drives the first 300 miles of a trip at 60 miles an hour. How fast does he have to drive, in miles per hour, on the final 200 miles of the trip if the total time of the trip is to equal 7 hours?

[Reveal] Spoiler: OA
100 mph

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Director
Joined: 20 Apr 2016
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Kudos [?]: 496 [0], given: 86

Re: Luke drives the first 300 miles of a trip at 60 miles an hou [#permalink]  04 Dec 2017, 22:04
Bunuel wrote:
Luke drives the first 300 miles of a trip at 60 miles an hour. How fast does he have to drive, in miles per hour, on the final 200 miles of the trip if the total time of the trip is to equal 7 hours?

[Reveal] Spoiler: OA
100 mph

Kudos for correct solution.

Here,

First 300 miles, Luke drives = 60m/hr

Therefore time taken = $$\frac{300}{60}$$ = 5hrs

Total time taken for entire journey= 7 hrs

therefore she must complete the 200 miles in = 7 - 5 = 2hrs.

So the speed she needs to travel for 200 miles = $$\frac{200}{2}$$ = 100 m/hr
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Re: Luke drives the first 300 miles of a trip at 60 miles an hou   [#permalink] 04 Dec 2017, 22:04
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