Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 18)
18.
Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
Answer: Option
Explanation:
| Number of pages typed by Ravi in 1 hour = | 32 | = | 16 | . |
| 6 | 3 |
| Number of pages typed by Kumar in 1 hour = | 40 | = 8. |
| 5 |
| Number of pages typed by both in 1 hour = |  |
16 | + 8 |  |
= | 40 | . |
| 3 | 3 |
 Time taken by both to type 110 pages = |
|
110 x | 3 | |
hours |
| 40 |
| = 8 | 1 | hours (or) 8 hours 15 minutes. |
| 4 |
Discussion:
53 comments Page 5 of 6.
Navya sri said:
6 years ago
Can any one explain me that why you multipled with 3/40 with 110. But we got 40/3 for 1 hour.
(1)
NEERAJ said:
5 years ago
Time taken by Ravi for typing 32 pages=6hours.
Time taken by Kumar for typing 40 pages=5hours.
Therefore, time taken for Ravi for typing 1 page=6/32.
Similarly, time taken by Kumar for typing 1 page=5/40.
So, time taken when both worked together for typing 1page= (6/32) + (5/40).
Time taken when both worked together for typing 110 pags=110* ( (6/32) + (5/40)).
Is this method valid? Anyone suggest me.
Time taken by Kumar for typing 40 pages=5hours.
Therefore, time taken for Ravi for typing 1 page=6/32.
Similarly, time taken by Kumar for typing 1 page=5/40.
So, time taken when both worked together for typing 1page= (6/32) + (5/40).
Time taken when both worked together for typing 110 pags=110* ( (6/32) + (5/40)).
Is this method valid? Anyone suggest me.
(2)
Himanshu said:
5 years ago
Ravi typed 32 pages in 6 hrs that mean in one hour he typed 6 pages.
Kumar typed 40 pages in 5hrs that mean in one hour he typed 8 pages.
If they both work together they can type 8+6=14 pages per hour.
Now they have to type 110 page and they can type 14 page per hour.
110/14 = 7.85 =7 hrs and 85 min =8hrs and 15 min.
Kumar typed 40 pages in 5hrs that mean in one hour he typed 8 pages.
If they both work together they can type 8+6=14 pages per hour.
Now they have to type 110 page and they can type 14 page per hour.
110/14 = 7.85 =7 hrs and 85 min =8hrs and 15 min.
(18)
Pema said:
5 years ago
@Himanshu,
Your method is very simple and clean, thanks.
But 32/6 gives you approximately 5.33.
Following your steps, the answer is option D. Which is 8hours:25mins. Please check it.
Your method is very simple and clean, thanks.
But 32/6 gives you approximately 5.33.
Following your steps, the answer is option D. Which is 8hours:25mins. Please check it.
(4)
Ladshika Mohan said:
5 years ago
3*110/40 = 8.25 then how come 8.15?
(2)
M.Sheela said:
4 years ago
Those who have doubt in 25 minutes & 15 min.
Just look at here;
The Answer is 8 (1/4) = 8 hrs 1/4*60 minutes.
i.e 8hrs and 15 minutes.
Or we can say 1/4th of 1hr(60min.) is 15 minutes.
Just look at here;
The Answer is 8 (1/4) = 8 hrs 1/4*60 minutes.
i.e 8hrs and 15 minutes.
Or we can say 1/4th of 1hr(60min.) is 15 minutes.
(6)
Supritam Mohanty said:
4 years ago
Ans. is 8.25.
The ans is 8(1/4),
That means 8.25.
Because 1/4= 0.25.
The ans is 8(1/4),
That means 8.25.
Because 1/4= 0.25.
(6)
Kishan Maurya said:
4 years ago
The right Answer is 8.25.
(21)
Aditya said:
3 years ago
40/3 Pages takes 1 hour.
110 pages will take x hours.
Therefore : 110*(40/3) = 110 * 3/40.
110 pages will take x hours.
Therefore : 110*(40/3) = 110 * 3/40.
(4)
Gaurav kadaskar said:
1 year ago
The correct answer is 8.25 hr.
(5)
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