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 10 of 27.
Soujanya said:
9 years ago
The correct method is;
1 hour = 30 degree,
1 min = 5.5 degree.
At 10 o'clock angle between them = 30*10=300
For 25min displacement between them = 25*5.5 = 137.5
So, angle between them = 300-137.5 = 162.5, for reflex angle = 360 (total angle is 360 degree) -162.5 (so, angle between them)= 197.5.
1 hour = 30 degree,
1 min = 5.5 degree.
At 10 o'clock angle between them = 30*10=300
For 25min displacement between them = 25*5.5 = 137.5
So, angle between them = 300-137.5 = 162.5, for reflex angle = 360 (total angle is 360 degree) -162.5 (so, angle between them)= 197.5.
Durai said:
9 years ago
1 min = 0.5 deg, 1hrs =30 deg. becz. 12h = 720 min, clock 12h = 360 deg.
Reflect angle mean measure angel more than 180 deg side.
So on clock 10.25 hrs mean the clock needle lies between 10-5.
So from 5 to 10 measure angle hours is 7 hr(Becz reflex angle method)=7X30 deg=210 deg.
25 min = 25X0.5 deg =12 1/2 deg.
Reflex angle method
Subtract hours by minutes (10hrs-25min) =210-12.5 = 197.5
Reflect angle mean measure angel more than 180 deg side.
So on clock 10.25 hrs mean the clock needle lies between 10-5.
So from 5 to 10 measure angle hours is 7 hr(Becz reflex angle method)=7X30 deg=210 deg.
25 min = 25X0.5 deg =12 1/2 deg.
Reflex angle method
Subtract hours by minutes (10hrs-25min) =210-12.5 = 197.5
Vijay Gupta said:
9 years ago
Sir, at 2:10, what will be the angle between minute and hour hand?
MOHIT KUMAR said:
9 years ago
Solution:
12 hrs=360 degree.
means 10.25 hrs = 625 mins.
Total angle covered by 10.25 hrs = (625/720)*360 = 312(1/2) degree //Angle from 12 to 10:25.
Now angle for min hand 25 mins = (25/60)*360= 150 degree.
Reflex angle = 150+ remaining angle between 10:25 and 12.
= 150+(360-312(1/2)).
= 150+47.5.
= 197.5 degree.
Thank You.
12 hrs=360 degree.
means 10.25 hrs = 625 mins.
Total angle covered by 10.25 hrs = (625/720)*360 = 312(1/2) degree //Angle from 12 to 10:25.
Now angle for min hand 25 mins = (25/60)*360= 150 degree.
Reflex angle = 150+ remaining angle between 10:25 and 12.
= 150+(360-312(1/2)).
= 150+47.5.
= 197.5 degree.
Thank You.
Chintan said:
9 years ago
What is Reflex angle at 2:30?
Please give the answer.
Please give the answer.
Deepak k swami said:
9 years ago
the maxim angle 180° not possible greater than 180°.
Anonymous said:
9 years ago
@Hell Rider cleared it very well.
Ahmed Naqvi said:
9 years ago
A Reflex Angle is one which is more than 180° but less than 360°.
Trilok said:
9 years ago
General formulae is (30h-11/2m).
But for reflection angle 360-(30h-11/2m).
But for reflection angle 360-(30h-11/2m).
Siri said:
9 years ago
But By using that formulate the answer is 162.5, So the answer is not matched with the given options. So how to correct the answer?
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