Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 3)
3.
A clock is started at noon. By 10 minutes past 5, the hour hand has turned through:
Answer: Option
Explanation:
Angle traced by hour hand in 12 hrs = 360°.
| Angle traced by hour hand in 5 hrs 10 min. i.e., | 31 | hrs = |  |
360 | x | 31 |  |
° | = 155°. |
| 6 | 12 | 6 |
Discussion:
88 comments Page 3 of 9.
Uma said:
2 decades ago
I can't understand how that 31/6 come?
(1)
Shravan purohit said:
1 decade ago
@navaneetha
Given : our hour hand started at noon i.e. 12 o'clock
and 10 minutes past 5 i.e. 5 hour 10 minutes
we find angle between 12 and 5.10 o'clock
firstly we convert 5hour 10min into minitus 5*60+10=310min
and 310min convert into hour 310/60=31/6
In 12h = 360
So in 31/6 h= (360/12)(31/6)=155 degree.
Given : our hour hand started at noon i.e. 12 o'clock
and 10 minutes past 5 i.e. 5 hour 10 minutes
we find angle between 12 and 5.10 o'clock
firstly we convert 5hour 10min into minitus 5*60+10=310min
and 310min convert into hour 310/60=31/6
In 12h = 360
So in 31/6 h= (360/12)(31/6)=155 degree.
(1)
Murali said:
2 months ago
Thanks all for explaining it.
(1)
Soundarya said:
9 years ago
5 min past 10.
Number of hours = 5.
Degrees rotated in 1 hour or 60= 30deg.
Degrees rotated in 5 hours = 150deg.
Degree rotated in 10 min = (30/6) =5.
Degrees rotated in 10 min past 5 = 155deg.
Number of hours = 5.
Degrees rotated in 1 hour or 60= 30deg.
Degrees rotated in 5 hours = 150deg.
Degree rotated in 10 min = (30/6) =5.
Degrees rotated in 10 min past 5 = 155deg.
Sowmya said:
9 years ago
12pm to 5pm = 5hrs.
1hr = 30°.
Therefore, 5 * 30 = 150°.
Tilting time = 10min.
1 min = 1/2°.
Therefore, 10/2 = 5°.
Ans = 150° + 5° = 155°.
1hr = 30°.
Therefore, 5 * 30 = 150°.
Tilting time = 10min.
1 min = 1/2°.
Therefore, 10/2 = 5°.
Ans = 150° + 5° = 155°.
Shreya raut said:
9 years ago
1 hr = 30° and 1 min = (1/2)°,
So , 5 hrs = 150 min and 10 min = 5°,
Thus 150 + 5 = 155°.
So , 5 hrs = 150 min and 10 min = 5°,
Thus 150 + 5 = 155°.
Bhadra said:
9 years ago
Thanks for your explanation @Shreya Raut.
Mehak said:
9 years ago
How 31/6?
Still can't understand.
Still can't understand.
Mohan said:
9 years ago
How 31/6 will come? Please explain me.
Vinoth said:
9 years ago
Best explanation, thanks @Shreya Raut.
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