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:
361 comments Page 37 of 37.
Disha said:
5 years ago
Every 3 days 1/5 work is done. Then in how many days 1 whole work is done.
Mathematically = 1/5:3::1:x.
3*1/ (1/5) = 3÷1/5= 3*5/1= 3*5= 15.
Mathematically = 1/5:3::1:x.
3*1/ (1/5) = 3÷1/5= 3*5/1= 3*5= 15.
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