Aptitude - Clock - Discussion
Discussion Forum : Clock - General Questions (Q.No. 2)
2.
The reflex angle between the hands of a clock at 10.25 is:
Answer: Option
Explanation:
| Angle traced by hour hand in | 125 | hrs = |  |
360 | x | 125 |  |
° | = 312 | 1 | ° | . |
| 12 | 12 | 12 | 2 |
| Angle traced by minute hand in 25 min = | |
360 | x 25 | |
° | = 150°. |
| 60 |
 Reflex angle = 360° - |
|
312 | 1 | - 150 | |
° | = 360° - 162 | 1 | ° | = 197 | 1° | . |
| 2 | 2 | 2 |
Discussion:
269 comments Page 6 of 27.
B.Vamsi Srinivas said:
1 decade ago
Have a look at my solution once...
Time 10:25
Reflex Time...
11:60
-10:25
~~~~~~~
1:35
formulae to find angle
Angle = 11*(m)
---- - 30(h)
2
m = minutes
h = hours
so
now
11*35
= ----- - 30* 1
2
385 - 60
= --------
2
325
=---
2
1
=167 ---
2
Correct me if I'm wrong.
Time 10:25
Reflex Time...
11:60
-10:25
~~~~~~~
1:35
formulae to find angle
Angle = 11*(m)
---- - 30(h)
2
m = minutes
h = hours
so
now
11*35
= ----- - 30* 1
2
385 - 60
= --------
2
325
=---
2
1
=167 ---
2
Correct me if I'm wrong.
Nandhini said:
1 decade ago
This is the formula to calculate the angle.
Angle = min*(11/2)-30*hour.
Angle = min*(11/2)-30*hour.
Mayur said:
1 decade ago
Simple solution.
At 10 o'clock angle between them = 300
for 25min displacement between them = 25*5.5 = 137.5
so, angle between them = 300-137.5 = 162.5
for reflex angle = 300-162.5 = 197.5
At 10 o'clock angle between them = 300
for 25min displacement between them = 25*5.5 = 137.5
so, angle between them = 300-137.5 = 162.5
for reflex angle = 300-162.5 = 197.5
Ravi said:
1 decade ago
Angle traced in 1 hour=360/12=30 angle
Angle traced in 10 hours=30*10=300 angle
Angle traced in 25min=25/60hour=30*25/60 angle=25/2=12.5 angle=12(1/2)
total Angle traced in 10hour25min=300+12.5 angle =312(1/2)
Angle traced by minute hand in 25 min =(360/60)*25=150 angle
hence 312(1/2)-150=197.5=197(1/2)
Angle traced in 10 hours=30*10=300 angle
Angle traced in 25min=25/60hour=30*25/60 angle=25/2=12.5 angle=12(1/2)
total Angle traced in 10hour25min=300+12.5 angle =312(1/2)
Angle traced by minute hand in 25 min =(360/60)*25=150 angle
hence 312(1/2)-150=197.5=197(1/2)
Jitendra chauhan said:
1 decade ago
It is very easy. We can solve it like
10.25 hr=10hr+25 min
=(10+25/60)hr
=10+5/12
=(120+5)/12
=125/12 hr
10.25 hr=10hr+25 min
=(10+25/60)hr
=10+5/12
=(120+5)/12
=125/12 hr
Wasim said:
1 decade ago
Reflex angle is defined as the angle obtained when the angle between hour and minute hand is subtracted from 360 degree.
Gouthamprasanna said:
1 decade ago
To calculate the reflex angle formula is
= 360-(30*H-11/2*M)
Where His hours hand and M is minute hand.
= 360-(30*H-11/2*M)
Where His hours hand and M is minute hand.
Jyothipriya said:
1 decade ago
Please explain the concept clearly how to find the exact reflex angle.
Balaji said:
1 decade ago
Prassaa is correct. First use the formula 30h-(11/2)m. if the answer comes 180 below. I think all of you got the answer is 137.5
Then simply subtract it from 360. Then we get the 197.5 like that.
Otherwise I mean if the answer comes 180+ then that is the answer no need subtract it from 360.
Then simply subtract it from 360. Then we get the 197.5 like that.
Otherwise I mean if the answer comes 180+ then that is the answer no need subtract it from 360.
Vasuroshan said:
1 decade ago
Nice expalnation guys. I have a known formula.
30H-(11/2)M where H----Hours
M----Minutes
So, sub.. 30(10)-(11/2)(25)
(600-275)/2=162.5
If the angle is <180 sub from 360 viceversa...
360-162.5=197.5
I Hope You guys can understand.
30H-(11/2)M where H----Hours
M----Minutes
So, sub.. 30(10)-(11/2)(25)
(600-275)/2=162.5
If the angle is <180 sub from 360 viceversa...
360-162.5=197.5
I Hope You guys can understand.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers