Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 14)
14.
At what time between 4 and 5 o'clock will the hands of a watch point in opposite directions?
Answer: Option
Explanation:
At 4 o'clock, the hands of the watch are 20 min. spaces apart.
To be in opposite directions, they must be 30 min. spaces apart.
Minute hand will have to gain 50 min. spaces.
55 min. spaces are gained in 60 min.
| 50 min. spaces are gained in |  |
60 | x 50 |  min. or 54 |
6 | min. |
| 55 | 11 |
| Required time = 54 |
6 | min. past 4. |
| 11 |
Discussion:
55 comments Page 3 of 6.
Owen Wilson said:
8 years ago
What does it mean when it says "55 min. spaces are gained"?
Pratima said:
8 years ago
Between 4 and 5, the minute hand to move 20 min in right half of circle (watch) from the initial point that is 12 here.
And 30 minutes from 4 in another side to go in opposite direction. So total is 20+30=50.
And 30 minutes from 4 in another side to go in opposite direction. So total is 20+30=50.
Ajay Kumar said:
8 years ago
You explained very well. Thanks @Kiran.
Nikita Agrawal said:
8 years ago
Somebody, please tell me the degrees of every direction.
Ash said:
7 years ago
Guys when to use (4h-11/2 *m) and when to use (11/2*m-4h). Can anybody please explain this?
Avijit Samanta said:
7 years ago
Use this formula:
(5n+30)*12/11 if n<6.
(5n-30)*12/11 if n>6.
(5n+30)*12/11 if n<6.
(5n-30)*12/11 if n>6.
Rinju said:
7 years ago
The two hands of a clock will be opposite direction between H and ( H+1) O' clock at 60a/11 minutes past H' O clock.
Solve this problem by using this method,
'a' is opposite to H,
In this case, H is 4 and a is 10,
Then 60*10/11,
600/11= 54 6/11 past 4.
Solve this problem by using this method,
'a' is opposite to H,
In this case, H is 4 and a is 10,
Then 60*10/11,
600/11= 54 6/11 past 4.
Arunkumar said:
6 years ago
Thanks @Nithisha.
Pasumarthy said:
1 decade ago
@xyz, @abc let's say initially both are at 12, after 60 min hours is at 1 and minutes hand at 12. So, in 60 min they traveled 55 min spaces apart.
Siri said:
1 decade ago
I am not clear above answer any one tell me.
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