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The time it takes to erect a bonfire is inversely proportion
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19 May 2018, 15:25
19 May 2018, 15:25
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Question Stats:
72% (00:29) correct
27% (01:18) wrong based on 11 sessions
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The time it takes to erect a bonfire is inversely proportional to the number of students doing the work. If it takes 20 students 1.5 hours to do the job, how long will it take 35 students to do the job, to the nearest minute?
(A) 51
(B) 52
(C) 53
(D) 54
(E) 55
(A) 51
(B) 52
(C) 53
(D) 54
(E) 55
Re: The time it takes to erect a bonfire is inversely proportion
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21 May 2018, 21:05
21 May 2018, 21:05
20 students take 90 minutues.
1 student would take 90*20 = 1800 minutes.
35 students would equally divide this total time, hence 1800/35
=51.4
When rounded to nearest whole number it would be 51 minutes.
However, I doubt if this is correct. As in 51 minutes a fraction of work would be still left undone. So how do we choose between 51 and 52.
1 student would take 90*20 = 1800 minutes.
35 students would equally divide this total time, hence 1800/35
=51.4
When rounded to nearest whole number it would be 51 minutes.
However, I doubt if this is correct. As in 51 minutes a fraction of work would be still left undone. So how do we choose between 51 and 52.
gmatclubot
Re: The time it takes to erect a bonfire is inversely proportion [#permalink]
21 May 2018, 21:05
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