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27 Apr 2021, 03:30
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Difficulty:
5%
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Question Stats:
94% (01:07) correct
6%
(01:19)
wrong
based on 131
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A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. In how many days can A alone finish the remaining work ?
(A) 6 1/2 days
(B) 7 1/2 days
(C) 8 days
(D) 9 days
(E) 9 1/2 days
(A) 6 1/2 days
(B) 7 1/2 days
(C) 8 days
(D) 9 days
(E) 9 1/2 days
27 Apr 2021, 20:11
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Given: A can complete work in 15 days, B can do it in 10 days. B works at it for 5 days and leaves.
Days in which A can finish the remaining work =?
B worked on it for 5 days, which is half the time required by B to complete the work.
=> B completed half of the work.
=> Remaining half of the work is to be competed by A alone.
A can complete the whole work in 15 days.
=> A can complete half of the work in half the time i.e. 7 \(\frac{1}{2}\) days
So, correct answer is option B.
Days in which A can finish the remaining work =?
B worked on it for 5 days, which is half the time required by B to complete the work.
=> B completed half of the work.
=> Remaining half of the work is to be competed by A alone.
A can complete the whole work in 15 days.
=> A can complete half of the work in half the time i.e. 7 \(\frac{1}{2}\) days
So, correct answer is option B.
23 Jul 2021, 06:09
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Bunuel
A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and then leaves. In how many days can A alone finish the remaining work ?
(A) 6 1/2 days
(B) 7 1/2 days
(C) 8 days
(D) 9 days
(E) 9 1/2 days
Solution:(A) 6 1/2 days
(B) 7 1/2 days
(C) 8 days
(D) 9 days
(E) 9 1/2 days
After 5 days, B finishes half of the work since it takes him 10 days to complete the entire job. Therefore, it takes A 7 1/2 days to finish the remaining work (the other half of the work) since it takes him 15 days to complete the entire job.
Answer: B
