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Zen and Noah decided to read a novel. When Noah started reading the no

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Intern
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Joined: 16 Sep 2018
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Zen and Noah decided to read a novel. When Noah started reading the no  [#permalink]

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New post Updated on: 17 Sep 2018, 19:13
2
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

61% (01:42) correct 39% (01:42) wrong based on 33 sessions

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Zen and Noah decided to read a novel. When Noah started reading the novel, Zen had finished 60 pages. After 30 minutes, Noah overtakes Zen and both continue to read at their own speeds. How many pages will Noah be ahead of Zen, 50 minutes after Noah and Zen reading the same page?

(A) 40
(B) 60
(C) 80
(D) 100
(E) Can't be determined

Originally posted by Anush081297 on 17 Sep 2018, 11:11.
Last edited by Bunuel on 17 Sep 2018, 19:13, edited 1 time in total.
Renamed the topic and edited the question.
Intern
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Joined: 13 Jun 2017
Posts: 18
Re: Zen and Noah decided to read a novel. When Noah started reading the no  [#permalink]

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New post 17 Sep 2018, 11:49
2
Let the speed of Zen be Z and the speed of Noah be N.

According to the given data,

Number of pages read by Zen in 30 mins = 30Z

So, N = (60+30Z)/30 = 2+Z

Number of pages read by each on 50 mins:
Zen = 50Z
Noah = 50(2+Z) = 100 + 50Z

Therefore, Noah will be ahead of Zen by 100 + 50Z - 50Z = 100 Pages.

Answer D

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Joined: 26 Aug 2018
Posts: 7
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Re: Zen and Noah decided to read a novel. When Noah started reading the no  [#permalink]

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New post 17 Sep 2018, 12:03
2
1
Zen takes 30 minutes to read X
Noah takes 30 minutes to read X+60

This means Noah reads 60 pages more than Zen in 30 minutes.

So in 50 minutes:

30 minutes = 60 additional pages
50 minutes = Y additional pages

Y = 60*50/30 = 100

Answer D
GMAT Club Bot
Re: Zen and Noah decided to read a novel. When Noah started reading the no &nbs [#permalink] 17 Sep 2018, 12:03
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Zen and Noah decided to read a novel. When Noah started reading the no

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