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:
281 comments Page 24 of 29.
Shilpi said:
1 decade ago
Can you pls teach me this equation
1/30+1/90=4/90
1/30+1/90=4/90
Vikas said:
1 decade ago
I didnt understand how did we get that (3/2)*60 ?
Ashutosh said:
1 decade ago
Formula-->nx- (n+1) /nx.
4x-4x/3=60 so x=45/2.
4x-4x/3=60 so x=45/2.
Naidu said:
7 years ago
It is a good and clear method, Thanks @Prashant.
Udhay said:
9 years ago
I can't understand it. Please someone help me.
Haritha said:
8 years ago
It's a clear explanation.
Thank you @Sheetal.
Thank you @Sheetal.
Nishant said:
1 decade ago
@ G.P.
Thanks. I like the way you solve it.
Thanks. I like the way you solve it.
Sagar said:
5 years ago
Thank you for very simple answer @Malleswari.
Gowri said:
1 decade ago
kl/(k)^2-1
k=3
l=60
3*60/(3)^2-1
=45/2
=22.5
k=3
l=60
3*60/(3)^2-1
=45/2
=22.5
Sudip purakait said:
10 years ago
Hi @Sagar.
It is mentioned in the question.
It is mentioned in the question.
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