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:
87 comments Page 4 of 9.
John said:
1 decade ago
@Shravan Purohit's explanation is superb. I found it difficult understanding it initially but after @Shravan's explanation, I now understand it perfectly. Thanks Shravan.
Hemanth reddy said:
10 years ago
5 hrs 10 min's (given) > 1 hr = 30 degrees > 5 hrs = 150 degrees.
60 min = 30 degrees > 1 min = 0.5 degrees > 10 min = 5 degrees 5 hrs 10 min = 150+5 = 155.
60 min = 30 degrees > 1 min = 0.5 degrees > 10 min = 5 degrees 5 hrs 10 min = 150+5 = 155.
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°.
Anil said:
7 years ago
5 hours + 10 minutes.
5*30°+ 10*0.5° {Angle made by hour hand in 1 hour =30°, the angle made by hour hand in 1 min=0.5°}
150°+5°
155°.
5*30°+ 10*0.5° {Angle made by hour hand in 1 hour =30°, the angle made by hour hand in 1 min=0.5°}
150°+5°
155°.
Mudasir rashid said:
8 years ago
Firstly, convert 5hrin minutes.
5*60=300
Add 10 min
=310min.
Now convert 310min in hr.
310min=310/60=31/6hr.
1 hr=(360/12)°.
31/6hr=(360/12)*31/6=155°.
5*60=300
Add 10 min
=310min.
Now convert 310min in hr.
310min=310/60=31/6hr.
1 hr=(360/12)°.
31/6hr=(360/12)*31/6=155°.
Vaibhav said:
5 years ago
Hr hand move 10 min in 5 hrs so afternoon means start from 12 then after 5 hrs show 5 o'clock but 10 min means 10/2=5° so 12 to 5 150°+5°=155°.
Mohd faisal said:
10 years ago
Formula = (Section-Difference) multiply by 30 +or- minute/2.
According to Formula time = 5:10.
(10-5) multiply 30+10/2.
= 5*30+5 = 150+5.
155 is answer.
According to Formula time = 5:10.
(10-5) multiply 30+10/2.
= 5*30+5 = 150+5.
155 is answer.
Mary said:
1 decade ago
Its easy
1hr=30 degree
ie 5hr=5*30=150 degree
also
10 min=10/60hr=1/6hr
we know 1hr=30 degree
ie
(1/6)*30=5 degree
so 150 deg+5 deg=155 deg.
its solved :)
1hr=30 degree
ie 5hr=5*30=150 degree
also
10 min=10/60hr=1/6hr
we know 1hr=30 degree
ie
(1/6)*30=5 degree
so 150 deg+5 deg=155 deg.
its solved :)
Parul saxena said:
10 years ago
In the previous question separate degree was calculated for minute hand. Then why in this question separate degree are not calculated for minute hand?
Bhushan Gore said:
9 years ago
Convert the hours into mins so, 12 * 60=720 mins = 360d.
5 * 60+10min = 310 mins =?.
720/60hrs = 12 = 360.
310/60hr = 31/6 = ?
360/12*31/6 = 155.
5 * 60+10min = 310 mins =?.
720/60hrs = 12 = 360.
310/60hr = 31/6 = ?
360/12*31/6 = 155.
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