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 5 of 9.
Kailash patria said:
8 years ago
Hour hand completed 150 (90+60) upto 5 o'clock.
Now, for more 10 minutes past hour hand will move 5° (30° in 60 minutes multiplied by 10 (i.e. 1/2 degree per minute).
Hence total movement 150+5=155.
Now, for more 10 minutes past hour hand will move 5° (30° in 60 minutes multiplied by 10 (i.e. 1/2 degree per minute).
Hence total movement 150+5=155.
Phaneendra said:
7 years ago
10 min past to 5 means time is 4:50.
Ravikiran said:
7 years ago
1hr=30degrees.
Therefore 5hr and 10min=5*30=150=X.
=10min=5degree=Y,
Z=X+Y,
Z=150+5,
Z=155 degree.
Therefore 5hr and 10min=5*30=150=X.
=10min=5degree=Y,
Z=X+Y,
Z=150+5,
Z=155 degree.
Akhila t s said:
7 years ago
31/6 means the time is 5:10.
5 * 10/60 = 31/6,
1hr-30 minutes then,
31/6 * 30 = 155°
5 * 10/60 = 31/6,
1hr-30 minutes then,
31/6 * 30 = 155°
Aisha Raja said:
7 years ago
@Thongoc992.
It says at the START of noon which is 12 o'clock.
It says at the START of noon which is 12 o'clock.
Sabungar said:
6 years ago
The clock is started noon matlab 12 o clock.
15 min =90 degree,
1 hr =360 degree,
Clock is start 12 o clock to 5 o clock .
Min hand is 10.
10*0.5=5
=> 5 and 6 gap between the 30 degrees.
So,30 -5 =25
And180-25=155°.
15 min =90 degree,
1 hr =360 degree,
Clock is start 12 o clock to 5 o clock .
Min hand is 10.
10*0.5=5
=> 5 and 6 gap between the 30 degrees.
So,30 -5 =25
And180-25=155°.
Navaneetha krishnan said:
1 decade ago
Sir i can't understand that 155 degree for which timing?
Santthosh said:
1 decade ago
I accept all of your comments, but what my doubt is if minute hand makes 5 ticks of 6 degree to contribute 5 minutes, then hour hand is making 6 ticks of 5 degree to contribute 1 hour. Why this variations in the ticks?
Yasin said:
1 decade ago
5.10?
hour hand moves 30 degree's for 1 hour
for 5 hours 5*30
in 10 min 10\60*30(in min)
150+5=155
hour hand moves 30 degree's for 1 hour
for 5 hours 5*30
in 10 min 10\60*30(in min)
150+5=155
Guru govind said:
1 decade ago
The question asked is not for angle b/w hours hand and minutes hand.the question is:how much distance only hours hand rotated from noon...
from 12 to 5:00 the hours hand rotated is 150degree.use the formula 30h-(11/2)*m=theta; now how much is the hours hand rotated in in 10min. i.e..for 1hour..it will make 30degree...for 10min..it will make 5degree. therefore 150+5=155
from 12 to 5:00 the hours hand rotated is 150degree.use the formula 30h-(11/2)*m=theta; now how much is the hours hand rotated in in 10min. i.e..for 1hour..it will make 30degree...for 10min..it will make 5degree. therefore 150+5=155
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