Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 4)
4.
A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:
Answer: Option
Explanation:
Ratio of times taken by A and B = 1 : 3.
The time difference is (3 - 1) 2 days while B take 3 days and A takes 1 day.
If difference of time is 2 days, B takes 3 days.
| If difference of time is 60 days, B takes |  |
3 | x 60 |  |
= 90 days. |
| 2 |
So, A takes 30 days to do the work.
| A's 1 day's work = | 1 |
| 30 |
| B's 1 day's work = | 1 |
| 90 |
| (A + B)'s 1 day's work = | |
1 | + | 1 | |
= | 4 | = | 2 |
| 30 | 90 | 90 | 45 |
 A and B together can do the work in |
45 | = 22 | 1 | days. |
| 2 | 2 |
Discussion:
284 comments Page 23 of 29.
Sharan said:
1 decade ago
@Jaswinder singh: I understood your explanation man. Thanks.
Sam said:
1 decade ago
Did they mention that difference of working time is 60 days.
Anitha said:
7 years ago
A:B = 1:3
2p = 60
P = 30
30 : 90
1/30 + 1/90 = 2/45 = 22.5.
2p = 60
P = 30
30 : 90
1/30 + 1/90 = 2/45 = 22.5.
Priya said:
9 years ago
Please say me any shortcut methods to solve this problem.
Sagar said:
10 years ago
Please tell me how is the difference of time is 60 days?
Ashirwad dubey said:
2 decades ago
Hi friends
k*x/(k^2-1)
k=3
x=60 given in que
ok friends
k*x/(k^2-1)
k=3
x=60 given in que
ok friends
Rahul said:
1 decade ago
Can we solve such questions by LCM method? Please help.
Harsh said:
7 years ago
I am not understanding anything this, please explain.
Paru said:
5 years ago
@Harsha
You gave a very good explanation, thank you.
You gave a very good explanation, thank you.
Gogo said:
3 years ago
A+B = (1/30 + 1/90) = 2/45.
How we are getting this?
How we are getting this?
(8)
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