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:
345 comments Page 27 of 35.
Harsh said:
6 years ago
Can you explain why you have put 1_7/15?
Lohith said:
5 years ago
How (1/15+1/20 )= 7/60? Explain, please.
Mani said:
1 decade ago
Still i have confusion. How 7/60 comes?
Sai kishore said:
1 decade ago
Still I have confusion. How 7/60 comes?
Bhargav said:
10 years ago
I don't understand why we take 1-7/15?
Santhosh said:
9 years ago
Can anyone explain this in LCM method?
NISHA said:
8 years ago
Why sub this (1-7/15) can you explain?
Bha said:
1 year ago
Thanks all for explaining the answer.
(24)
Trupti said:
1 decade ago
Thanks Parthiban. I understood well.
Dhanalakshmi said:
9 years ago
Thanks for your explanation @Swetha.
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