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If 45 people built
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Updated on: 26 Sep 2018, 05:14
Updated on: 26 Sep 2018, 05:14
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90% (02:16) correct
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If 45 people built \(\frac{1}{2}\) of a pyramid in 288 days, how many days did it take 65 people to build the next \(\frac{1}{6}\) the pyramid, rounded to the nearest integer, assuming each person works at the same constant rate?
(A) 66 days
(B) 77 days
(C) 88 days
(D) 87 days
(E) 76 days
(A) 66 days
(B) 77 days
(C) 88 days
(D) 87 days
(E) 76 days
Originally posted by Shrija Roy on 14 Mar 2018, 08:00.
Last edited by Carcass on 26 Sep 2018, 05:14, edited 1 time in total.
Last edited by Carcass on 26 Sep 2018, 05:14, edited 1 time in total.
Edited by Carcass
Re: work rate time problem - please help!
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14 Mar 2018, 12:56
14 Mar 2018, 12:56
Expert Reply
has this question the answer choices ??
if yes, please add them.
Thank you.
Regards
if yes, please add them.
Thank you.
Regards
Re: work rate time problem - please help!
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09 Apr 2018, 05:08
09 Apr 2018, 05:08
1
Shrija Roy wrote:
18. If 45 people built 1/2 of a pyramid in 288 days, how many days did it take 65 people to build the next 1/6 the
pyramid, rounded to the nearest integer, assuming each person works at the same constant rate?
pyramid, rounded to the nearest integer, assuming each person works at the same constant rate?
45 people built 1/2 in 288 days.
So they will take 288*2 days for 1 pyramid.
=576 days
1 person will take 576*45 days or in 1 day, a person will do 1/576*45 of work.
so
65 people will build 65*1/576*45th of pyramid in one day.
For building 1/6th of pyramid it will take,
1/6 = 65*1/576*45 * y where y is number of days.
Solving for y, given 64 as closest integer.
Please share the official answer. Also if there is a shorter way to answer this question would help me as well.
