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:
89 comments Page 7 of 9.
Naveed Mohammad said:
1 decade ago
Formula for finding degree when min and hr ar given is
angle = (11/2)*m - 30*h when (11/2)*m > 30*hr
angle = 30*hr-(11/2)*m when (30hr > (11/2)*m
where m = min, hr = hours
=30*5-(11/2)*10
=150-(120/2)
=(300-120)/2
=180/2
=90 degrees
Its a time institute materiel solution.
angle = (11/2)*m - 30*h when (11/2)*m > 30*hr
angle = 30*hr-(11/2)*m when (30hr > (11/2)*m
where m = min, hr = hours
=30*5-(11/2)*10
=150-(120/2)
=(300-120)/2
=180/2
=90 degrees
Its a time institute materiel solution.
Akshay said:
2 decades ago
10min past 5 is 5:10
so, 5+10/60 =5+1/6(cross multiply)=31/6
so, 5+10/60 =5+1/6(cross multiply)=31/6
Nitin harjai said:
2 decades ago
I don't understand "by 10min past 5".
Mariah said:
2 decades ago
What is the formula of changing minutes or hours to degrees?
Sandhya said:
2 decades ago
5.10/60
=5.2/12
=5.1/6
=5*6+1/6
=31/6
=5.2/12
=5.1/6
=5*6+1/6
=31/6
Pradeep said:
2 decades ago
@nilesh
1hr=30 degree
.'. 31/6 hr= 31/6 * 30 =155 deg
1hr=30 degree
.'. 31/6 hr= 31/6 * 30 =155 deg
Nilesh said:
2 decades ago
I cant undrstand how that
31/6 hrs= (360/12 * 31/6) = 155
31/6 hrs= (360/12 * 31/6) = 155
Pradeep Gorai said:
2 decades ago
To Uma
5 hr 1o min=310min(5*60+10)
=310/60 hr
=31/6 hr.
or
5 hr 10 min=5+10/60
=31/6
5 hr 1o min=310min(5*60+10)
=310/60 hr
=31/6 hr.
or
5 hr 10 min=5+10/60
=31/6
Sarawar said:
1 decade ago
At n'o clock the angle of hour hand from vertical is 30 n; speed of hour hand is 5 degree per minute; speed of minute hand is 6 dpm.
At 5.10 angle of hour hand from vertical 5*30+0.5*10 = 155 degree.
Angle of minute hand from vertical 6*10 = 60;
Angle between hour and minute hand = 155-60 = 96.
Reflex angle 360-96 = 264.
At 5.10 angle of hour hand from vertical 5*30+0.5*10 = 155 degree.
Angle of minute hand from vertical 6*10 = 60;
Angle between hour and minute hand = 155-60 = 96.
Reflex angle 360-96 = 264.
Bhushan Gore said:
10 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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