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:
287 comments Page 21 of 29.
Biplab sarkar said:
8 years ago
Here given k=3, n=60.
So formula is -> kn/ (k^2-1) =3*60/ (3^2-1) =180/8=22 1/2 days.
So formula is -> kn/ (k^2-1) =3*60/ (3^2-1) =180/8=22 1/2 days.
Billal Hossain said:
6 years ago
x : 3x.
3x - x = 60,
=> 2x = 60,
=> x = 30,
1/30 + 1/90,
= 4/90.
= 22 (1/2).
3x - x = 60,
=> 2x = 60,
=> x = 30,
1/30 + 1/90,
= 4/90.
= 22 (1/2).
Hindu said:
1 decade ago
Hai sheetal your shortcut method helps lot to understand so quickly its really super.
Naveen said:
2 decades ago
Hi, in prashanth answer, he equals the ratio 1/3 to 60-x/x but it actually x-60/x.
Prakash said:
1 decade ago
But there is not given difference in question they given A finish work in 60 day?
Vidya said:
1 decade ago
Can you please solve this using unitary method. Its b'coz I follow that method.
Vinod reddy said:
1 decade ago
THANK U SHEETAL,your short cut method is simply super.there is no words to say
Neeraj said:
1 decade ago
A will finish the work 60 days lesser than B.
What is it mean please explain?
What is it mean please explain?
Priya said:
2 decades ago
Please tell me why we are taking 3/2 to multiply with 60. Please explin me.
Kalyani said:
1 decade ago
What is the meaning of taking 3/2 in the problem. What's that ratio about?
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