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:
355 comments Page 32 of 36.
Depl said:
2 decades ago
Oh! Thanks I understood well.
Kamal said:
2 decades ago
I didn't undestand last step.
Prathyusha said:
1 decade ago
Why we takes total work as 1?
MUHAMMAD SHAHID ZAFAR said:
1 decade ago
Why you subtract 7/15 from 1?
Karthik said:
9 years ago
How comes 300 please explain?
Vishnu said:
6 years ago
Good, thanks @Billal Hossin.
Raghu said:
2 years ago
How 7 comes? Please explain.
(22)
Mohideen said:
2 decades ago
@sundar.
Good explanation.
Good explanation.
Thiyagu said:
1 decade ago
How the 0.53333 come 8/15 ?
Sheelu said:
2 decades ago
1/15+1/20=7/60
7/60*4=8/15
7/60*4=8/15
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