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:
53 comments Page 1 of 6.
Aravind said:
1 decade ago
If any tell me how is it come 30 min space apart...
Siri said:
1 decade ago
I am not clear above answer any one tell me.
Srikanth said:
1 decade ago
Here 30 min space apart means for opposite directions of minute hand and hour hand 30 min space apart.
Shree Hema said:
1 decade ago
Here we can use the formula:
theta=11(m)/2-30(h)
opposite direction means 180 degree; hour=4
180=11(m)/2-30(4)
m=54 6/11
theta=11(m)/2-30(h)
opposite direction means 180 degree; hour=4
180=11(m)/2-30(4)
m=54 6/11
Shivakarthik said:
1 decade ago
Its simple only so i think formula s no need for this ... if both the hands r in opposite direction or in the same straight line in 30 mins spaces ... v have 2 find out the time b\w 4 to 5 . at the time of 4 the spaces b\w the both hand s 20 min so 20=30=50 ...
60/55*50 =54*6/11min past4. hope u will understand?
60/55*50 =54*6/11min past4. hope u will understand?
Shivakarthik said:
1 decade ago
Its simple only so i think formula s no need for this ... if both the hands r in opposite direction or in the same straight line in 30 mins spaces ... v have 2 find out the time b\w 4 to 5 . at the time of 4 the spaces b\w the both hand s 20 min so 20+30=50 ...
60/55*50 =54*6/11min past4. hope u will understand?
60/55*50 =54*6/11min past4. hope u will understand?
Neeraj said:
1 decade ago
Why 50 min why not 10 min to be 30 spaces apart ?
Xyz said:
1 decade ago
@Neeraj
Because the minutes hand can move only in clock-wise direction. So 20 min to reach at the same place as the hour hand + 30 min reach in the opposite direction.
Because the minutes hand can move only in clock-wise direction. So 20 min to reach at the same place as the hour hand + 30 min reach in the opposite direction.
Xyz said:
1 decade ago
Can somebody tell me why it will gain only 55 min spaces in 60 min?
Abc said:
1 decade ago
Same query as xyz have. Please answer it if any one knows.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers