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To do a certain work B would take three times as long as A and C

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General GMAT Forum Moderator
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To do a certain work B would take three times as long as A and C  [#permalink]

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New post 17 Mar 2019, 21:21
1
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A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

57% (03:01) correct 43% (02:17) wrong based on 23 sessions

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To do a certain work B would take three times as long as A and C together and C twice as long as A and B together. The three men complete the work together in 10 days. How long would each take separately?

A. 20, 60, 40
B. 24, 40, 30
C. 10, 90, 20
D. 12, 90, 18
E. 24, 80, 36
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Re: To do a certain work B would take three times as long as A and C  [#permalink]

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New post 19 Mar 2019, 12:12
DisciplinedPrep wrote:
To do a certain work B would take three times as long as A and C together and C twice as long as A and B together. The three men complete the work together in 10 days. How long would each take separately?

A. 20, 60, 40
B. 24, 40, 30
C. 10, 90, 20
D. 12, 90, 18
E. 24, 80, 36



we can solve
23*40+24*30+40*30 / 28800
option B matches to combined rate = 10 days
GMAT Club Bot
Re: To do a certain work B would take three times as long as A and C   [#permalink] 19 Mar 2019, 12:12
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To do a certain work B would take three times as long as A and C

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