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A man after travelling 50 kms meets his friend who counsels him to go

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A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 21 Sep 2009, 11:56
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A man after travelling 50 kms meets his friend who counsels him to go slower. He then proceeds at 3/4th of his former speed and arrives at his destination 35 mins late.Had the meeting occured 24 km further the man would have reached its destination 25 mins late. The speed of man is

A. 48 km/hr
B. 36 km/hr
C. 54 km/hr
D. 58 km/hr

Last edited by virtualanimosity on 24 Sep 2009, 02:59, edited 1 time in total.
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 22 Sep 2009, 02:36
it means man travel 24km in 10min
Then 144km/hr is the speed of man.

Which speed are you asking?
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 22 Sep 2009, 12:02
Trick question... there is no Dog?
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 24 Sep 2009, 03:01
My guess...it is the original speed they r asking!

prabu wrote:
it means man travel 24km in 10min
Then 144km/hr is the speed of man.

Which speed are you asking?
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 24 Sep 2009, 03:03
Sorry man..typing error.. its the 'speed of the man' that the question asks

cdowwe wrote:
Trick question... there is no Dog?
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 24 Sep 2009, 03:15
answer is 48km/hr as per book

prabu wrote:
virtualanimosity wrote:
Sorry man..typing error.. its the 'speed of the man' that the question asks

cdowwe wrote:
Trick question... there is no Dog?


OA plz
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 24 Sep 2009, 10:22
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Q.
A man after travelling 50 kms meets his friend who counsels him to go slower. He then proceeds at 3/4th of his former speed and arrives at his destination 35 mins late.Had the meeting occured 24 km further the man would have reached its destination 25 mins late. The speed of man is

a.48 km/hr
b.36 km/hr
c. 54 km/hr
d. 58 km/hr

Soln:
Let the original speed of man be x.
Reduced speed is (3/4)x.

Since meeting after 50kms, and the reducing his speed he reaches his destination 35mins late.
But if the meeting had happened after 74kms(24 kms further) he reaches only 25 mins late.

Therefore the difference of 10 mins happens because of him travelling this 24kms at the different speeds( the original and the reduced)

thus
24/(3x/4) - 24/x = (10/60) => dividing 10 by 60 to convert into hours
solving this equation we get x = 48km/hr
Ans is A
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 31 Aug 2010, 06:20
srivas wrote:
Q.
A man after travelling 50 kms meets his friend who counsels him to go slower. He then proceeds at 3/4th of his former speed and arrives at his destination 35 mins late.Had the meeting occured 24 km further the man would have reached its destination 25 mins late. The speed of man is

a.48 km/hr
b.36 km/hr
c. 54 km/hr
d. 58 km/hr

Soln:
Let the original speed of man be x.
Reduced speed is (3/4)x.

Since meeting after 50kms, and the reducing his speed he reaches his destination 35mins late.
But if the meeting had happened after 74kms(24 kms further) he reaches only 25 mins late.

Therefore the difference of 10 mins happens because of him travelling this 24kms at the different speeds( the original and the reduced)

thus
24/(3x/4) - 24/x = (10/60) => dividing 10 by 60 to convert into hours
solving this equation we get x = 48km/hr
Ans is A


Man this is a classic GMAT mind ....
poor souls like me keep thinking abt x and y of algebra
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 31 Aug 2010, 10:22
I solved it thru algebra 48KMPH :-)
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 01 Sep 2010, 00:01
Is this GMAT question??
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Re: A man after travelling 50 kms meets his friend who counsels him to go [#permalink] New post 23 Aug 2015, 00:56
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Re: A man after travelling 50 kms meets his friend who counsels him to go   [#permalink] 23 Aug 2015, 00:56
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