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:
353 comments Page 33 of 36.
Sajid said:
1 year ago
(+1-7/15).
(-*-=+) = 8/15.
(-*-=+) = 8/15.
(3)
Beer ibrahim said:
2 decades ago
Why (1-7/15) is applied ?
(1)
Asshok said:
10 years ago
Why 1 - 7/15? Explain it.
Sagar said:
9 years ago
How to 300 come? Explain.
Gowtham said:
1 decade ago
How came remaining days?
Santhi said:
1 decade ago
Good explanation swetha.
Aadesh said:
9 years ago
28/60=14/30=7/15 @Pooja.
Swamy akunoori said:
1 decade ago
Good explanation anshu.
Pooja said:
9 years ago
How, (7/60 * 4) = 7/15?
Guna said:
1 year ago
Agree, the answer is D.
(6)
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