Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 1)
1.
A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :
Answer: Option
Explanation:
| A's 1 day's work = | 1 | ; |
| 15 |
| B's 1 day's work = | 1 | ; |
| 20 |
| (A + B)'s 1 day's work = |  |
1 | + | 1 |  |
= | 7 | . |
| 15 | 20 | 60 |
| (A + B)'s 4 day's work = | |
7 | x 4 | |
= | 7 | . |
| 60 | 15 |
| Therefore, Remaining work = | |
1 - | 7 | |
= | 8 | . |
| 15 | 15 |
Discussion:
344 comments Page 26 of 35.
AKT said:
3 years ago
Thanks everyone for explaining the answer.
(3)
Ayansh said:
3 years ago
How (1/15+1/20) = 7/60? Please explain me.
(37)
NADIPUDI SIRISHA said:
2 years ago
Thank you for explaining the answer @Giri.
(26)
Sowmiya said:
1 year ago
How remaing work =1? Please explain to me.
(20)
Hemamalini said:
1 year ago
How remaining work =1 ? Please explain me.
(35)
LOURDHU RANI said:
10 years ago
How came 1-7/15 step, I don't understand?
San said:
8 years ago
Here, 1/15+1/20= 20+15/300= 35/300 =7/60.
Fouzia said:
1 decade ago
Fouzia.
How that 7 came I can't got it?
How that 7 came I can't got it?
Ashik said:
1 decade ago
Why have you taken 1 as total work? HOW?
Harsh said:
5 years ago
Can you explain why you have put 1_7/15?
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