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# Yesterday it took a certain plane 3 hrs. to fly from City A

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Director
Joined: 24 Oct 2005
Posts: 573
Location: NYC
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Yesterday it took a certain plane 3 hrs. to fly from City A [#permalink]

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25 Jul 2007, 22:04
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Yesterday it took a certain plane 3 hrs. to fly from City A to City B at an average of 400 mph. Today the same plane flew from City A to City B at an average speed of 450 mph. How many more yesterday than it took today?*I didn't understand this part*
10,15, 20,25,30
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Director
Joined: 26 Feb 2006
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Re: Set 26 Q's Wrong No. 4 [#permalink]

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25 Jul 2007, 22:17
bewakoof wrote:
Yesterday it took a certain plane 3 hrs. to fly from City A to City B at an average of 400 mph. Today the same plane flew from City A to City B at an average speed of 450 mph. How many more yesterday than it took today?*I didn't understand this part*

10,15, 20,25,30

i think it is pretty straight though the last part of the question is unclear/

= 3 hours - 1200/450
= 20 minuets.
Director
Joined: 24 Oct 2005
Posts: 573
Location: NYC
Followers: 1

Kudos [?]: 63 [0], given: 0

Re: Set 26 Q's Wrong No. 4 [#permalink]

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25 Jul 2007, 22:19
Himalayan wrote:
bewakoof wrote:
Yesterday it took a certain plane 3 hrs. to fly from City A to City B at an average of 400 mph. Today the same plane flew from City A to City B at an average speed of 450 mph. How many more yesterday than it took today?*I didn't understand this part*

10,15, 20,25,30

i think it is pretty straight though the last part of the question is unclear/

= 3 hours - 1200/450
= 20 minuets.

Yeah the answer is C.. I just wasn't sure what GMAT meant by the last part..
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Success is my only option, failure is not -- Eminem

GMAT Club Legend
Joined: 07 Jul 2004
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Location: Singapore
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25 Jul 2007, 23:49
The distance between A and B = 400*3 = 1200 miles

Time taken today = 1200/450 = 8/3 hours

So it took 3-8/3 = 1/3 hour more = 1/3* 60 = 20 mins more yesterday
25 Jul 2007, 23:49
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