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General rate time work question

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jaspreets
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General rate time work question [#permalink] New post   03 Aug 2015, 11:29
Henry can write 21/4 pages of his novel in 3 hours.
At this rate, how many pages can Henry write in 8 hours?


The right answer of this Question is 14.

i have tried to solve this question as shown in the picture below.

Could someone please tell me where have i gone wrong?
Thanks in Advance. :)



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bulldurham
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Re: General rate time work question [#permalink] New post   03 Aug 2015, 11:53
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You need to divide 21/4 by 3/1, not multiply it. 21/4*1/3 would you give you a per hour rate of 21/12. multiply that by 8 and you get 14.
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VeritasPrepDennis
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Re: General rate time work question [#permalink] New post   03 Aug 2015, 11:57
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jaspreets wrote:
Henry can write 21/4 pages of his novel in 3 hours.
At this rate, how many pages can Henry write in 8 hours?


The right answer of this Question is 14.

i have tried to solve this question as shown in the picture below.

Could someone please tell me where have i gone wrong?
Thanks in Advance. :)



jaspreets -

21/4 is actually 5 and 1/4. If Henry can write 5.25 pages in 3 hours. that would be 1.75 pages per hour.

Your set up is incorrect because 21/4 divided by 3 would actually be 21/4 x 1/3 or 21/12 which is 1.75 as above.
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jaspreets
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Re: General rate time work question [#permalink] New post   03 Aug 2015, 12:05
bulldurham wrote:
You need to divide 21/4 by 3/1, not multiply it. 21/4*1/3 would you give you a per hour rate of 21/12. multiply that by 8 and you get 14.




Thanks mate, that now does make sense ...Enjoy your first Kudos :)

And thank you Dennis for explaining :) ...Appreciated :)
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Re: General rate time work question [#permalink] New post   03 Aug 2015, 12:10
jaspreets wrote:
Henry can write 21/4 pages of his novel in 3 hours.
At this rate, how many pages can Henry write in 8 hours?


The right answer of this Question is 14.

i have tried to solve this question as shown in the picture below.

Could someone please tell me where have i gone wrong?
Thanks in Advance. :)


Locking this thread as the question was not posted per the forums guidelines (link in my signatures!).

Please follow the guidelines and make sure to search for a question before posting.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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Re: General rate time work question [#permalink]
03 Aug 2015, 12:10
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

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