a b and c can do a piece of work in 30 20 and 10 days respectively - Wikitechy https://www.wikitechy.com/interview-questions/tag/a-b-and-c-can-do-a-piece-of-work-in-30-20-and-10-days-respectively/ Interview Questions Mon, 06 Sep 2021 05:09:43 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png a b and c can do a piece of work in 30 20 and 10 days respectively - Wikitechy https://www.wikitechy.com/interview-questions/tag/a-b-and-c-can-do-a-piece-of-work-in-30-20-and-10-days-respectively/ 32 32 A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day ? https://www.wikitechy.com/interview-questions/time-and-work/a-b-and-c-can-do-a-piece-of-work-in-20-30-and-60-days-respectively-in-how-many-days-can-a-do-the-work-if-he-is-assisted-by-b-and-c-on-every-third-day/ https://www.wikitechy.com/interview-questions/time-and-work/a-b-and-c-can-do-a-piece-of-work-in-20-30-and-60-days-respectively-in-how-many-days-can-a-do-the-work-if-he-is-assisted-by-b-and-c-on-every-third-day/#respond Wed, 18 Aug 2021 03:08:04 +0000 https://www.wikitechy.com/interview-questions/?p=2090

A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day ?

A. 18

B. 12

C. 15

D. 14

Answer : C. 15

Explanation:

A’s 2 day’s work = 1/20 x 2
= 1/10
(A + B + C) 1 day’s Work = (1/20 + 1/30 + 1/60)
= 6/60
= 1/10
Now,
Work done in 3 days = (1/10) + (1/10)
= 1/5
Now 1/5 work is done in 3 days.
Now whole work will be done in 3 * 5 = 15 days.

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