Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 8)
8.
The angle between the minute hand and the hour hand of a clock when the time is 4.20, is:
Answer: Option
Explanation:
| Angle traced by hour hand in | 13 | hrs = |  |
360 | x | 13 |  |
° | = 130°. |
| 3 | 12 | 3 |
| Angle traced by min. hand in 20 min. = | |
360 | x 20 | |
° | = 120°. |
| 60 |
Required angle = (130 - 120)° = 10°.
Discussion:
79 comments Page 6 of 8.
Jawahar.s said:
1 decade ago
360/12 *4 = 120.
360/60 *20 = 120.
120-120 = 0.
360/60 *20 = 120.
120-120 = 0.
Anurag Nayak said:
1 decade ago
Start at 4 pm. minute hand has to travel 20 min.
We know,
5 min gain by hour hand in 1 hour/60 min.
?? min gain by hour hand in these 20 min.
5/60 * 20 = 5/3 min.
We know 5 min is 30 degree.
5/3 min is 30/3 = 10 degree. Simple.
We know,
5 min gain by hour hand in 1 hour/60 min.
?? min gain by hour hand in these 20 min.
5/60 * 20 = 5/3 min.
We know 5 min is 30 degree.
5/3 min is 30/3 = 10 degree. Simple.
Chaturbhuj Singh said:
1 decade ago
4:20 = 4 +20/60 = 4+1/3 = 13/3.
Ali Zohair Shah said:
1 decade ago
It is 4 degree.
Because hour hand moves 30 degree in 1hour.
So it is 1/3 hours passed so it rotates 10 degree.
Total angle of hours hand is 30*4+10 = 130 degree.
Minute hand moves 6 degree in 1 minute = 20*6 = 120 degree.
So 130-120 = 10 degree.
Because hour hand moves 30 degree in 1hour.
So it is 1/3 hours passed so it rotates 10 degree.
Total angle of hours hand is 30*4+10 = 130 degree.
Minute hand moves 6 degree in 1 minute = 20*6 = 120 degree.
So 130-120 = 10 degree.
Navya said:
1 decade ago
In the above someone said apply direct formula that is: 11M - 60H/2.
Can this formula be applicable to all problems guys.
Explain please.
Can this formula be applicable to all problems guys.
Explain please.
Praneeth said:
1 decade ago
Divide into 12 parts each division 30 deg. for hrs. hand for every min it moves by 1/2deg.
20 min = 20*1/2 = 10dg that's it.
20 min = 20*1/2 = 10dg that's it.
Karthiga said:
1 decade ago
To Anil.
Will the formula be applicable to all the problems sir?
Will the formula be applicable to all the problems sir?
Amit goswami said:
1 decade ago
12h - 360 degree.
12*60 min --> 360 degree.
1 min -- > 360/12*60.
20 min --> 20*360/(12*60).
-->10 degree.
12*60 min --> 360 degree.
1 min -- > 360/12*60.
20 min --> 20*360/(12*60).
-->10 degree.
Arko said:
1 decade ago
The formula is 30*h- (11/2) *m.
Nikhila said:
1 decade ago
Hey all.
We know that the minute hand is at 4 at 4. 20. We jst hav to calculate the angle moved by hour hand from 4 for 20 min.
For 60 min, Hour hand covers 360/12=30 degree.
For 20min, it covers 30*20/60= 10 degree. (Just cross multiply. ).
We know that the minute hand is at 4 at 4. 20. We jst hav to calculate the angle moved by hour hand from 4 for 20 min.
For 60 min, Hour hand covers 360/12=30 degree.
For 20min, it covers 30*20/60= 10 degree. (Just cross multiply. ).
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