Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 3)
3.
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?
Answer: Option
Explanation:
| A's 2 day's work = |  |
1 | x 2 |  |
= | 1 | . |
| 20 | 10 |
| (A + B + C)'s 1 day's work = | |
1 | + | 1 | + | 1 | |
= | 6 | = | 1 | . |
| 20 | 30 | 60 | 60 | 10 |
| Work done in 3 days = | |
1 | + | 1 | |
= | 1 | . |
| 10 | 10 | 5 |
| Now, | 1 | work is done in 3 days. |
| 5 |
Whole work will be done in (3 x 5) = 15 days.
Discussion:
357 comments Page 32 of 36.
Shridhar said:
9 years ago
Got it on 3 day B & C is helping A.
Renjini said:
1 decade ago
How could get 1/5? I can't understand.
Madhu said:
3 days ago
Yes, I think 20 is the correct answer.
(1)
Arun said:
1 decade ago
Can you explain the 3rd step please?
Manisha said:
1 decade ago
Please tell me answer in LCM method.
Priya said:
9 years ago
@All.
Please explain the last step.
Please explain the last step.
Rishi said:
7 years ago
How can you say the total work is 1?
Vishnu Vardhan said:
8 years ago
According to me, the answer is 12.
Roten said:
1 decade ago
@vikas.
Superb explanation. :-).
Superb explanation. :-).
Eswarijana said:
1 decade ago
I can't understand the last step.
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