Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 17)
17.
A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
Answer: Option
Explanation:
Ratio of times taken by A and B = 100 : 130 = 10 : 13.
Suppose B takes x days to do the work.
Then, 10 : 13 :: 23 : x  x = |
 |
23 x 13 |  |
x = |
299 | . |
| 10 | 10 |
| A's 1 day's work = | 1 | ; |
| 23 |
| B's 1 day's work = | 10 | . |
| 299 |
| (A + B)'s 1 day's work = | |
1 | + | 10 | |
= | 23 | = | 1 | . |
| 23 | 299 | 299 | 13 |
Therefore, A and B together can complete the work in 13 days.
Discussion:
119 comments Page 12 of 12.
Ammulu ch said:
1 decade ago
How 230%? Please explain clearly.
Durga said:
10 years ago
Please explain shortcut method.
Sree said:
1 decade ago
Why we consider 10:13::23:x ?
Pandu said:
1 decade ago
Why we consider 10:13::23:x?
Gopi Krishna said:
8 years ago
Thank you @Pratyusha.
Ramesh chowdary said:
1 decade ago
Thanks to Elumalai.
Sanjay said:
1 decade ago
How 100:130 comes?
Bhharath said:
6 years ago
Thanks @Abhishek.
Pradeep prajapati said:
1 decade ago
Chetan is right.
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