Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 8)
8.
A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:
Answer: Option
Explanation:
| (A + B)'s 1 day's work = | 1 |
| 10 |
| C's 1 day's work = | 1 |
| 50 |
| (A + B + C)'s 1 day's work = |  |
1 | + | 1 |  |
= | 6 | = | 3 | . .... (i) |
| 10 | 50 | 50 | 25 |
A's 1 day's work = (B + C)'s 1 day's work .... (ii)
| From (i) and (ii), we get: 2 x (A's 1 day's work) = | 3 |
| 25 |
 A's 1 day's work = |
3 | . |
| 50 |
 B's 1 day's work |
|
1 | - | 3 | |
= | 2 | = | 1 | . |
| 10 | 50 | 50 | 25 |
So, B alone could do the work in 25 days.
Discussion:
146 comments Page 12 of 15.
Sarumathi.S said:
10 years ago
What is the logic in the statement 2* (A's one day work).
Shree said:
8 years ago
Thank you for providing Clear and detailed explanation.
Jay said:
1 decade ago
@sneha.
Your explanation is so simple, thanks a lot.
Your explanation is so simple, thanks a lot.
Guru said:
2 decades ago
Thank you Nagu i get an idea from your explaination.
Sachinpachore said:
8 years ago
A=B+C;
C=1/50: A =B+1/50
A+B=1/10,
B = 1/25.
C=1/50: A =B+1/50
A+B=1/10,
B = 1/25.
Geeta vandana said:
7 years ago
@Awoke.
Your short cut method is nice. Thanks.
Your short cut method is nice. Thanks.
Akil Prakash said:
7 years ago
Thanks for sharing the shortcut method @Awoke.
Baba syed said:
7 years ago
@Awoke.
Superb Explanation, Nice keep it up.
Superb Explanation, Nice keep it up.
Priyanka said:
2 decades ago
I'm not getting how 2*(a`s 1day work)=3/25
Ganesh said:
1 decade ago
How you got 6/50?
Please someone explain.
Please someone explain.
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