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 12 of 27.
Neha said:
10 years ago
10:25.
= 10hrs 25mins.
But 60mins = 1hr.
Then 1min = 1/60hr.
So 25mins = 25/60hrs = 5/12 (after dividing by 5).
Hence= 10+5/12hrs.
= (120+5)/12hrs = 125/12.
= 10hrs 25mins.
But 60mins = 1hr.
Then 1min = 1/60hr.
So 25mins = 25/60hrs = 5/12 (after dividing by 5).
Hence= 10+5/12hrs.
= (120+5)/12hrs = 125/12.
Akshay said:
1 decade ago
If have to calculate angle at time hh:mm
Use formala as
Angle=|30(hh)-11/2(mm)|
To calculate calculate reflex angle use
Reflex Angle= 360-|30(hh)-11/2(mm)|
Use formala as
Angle=|30(hh)-11/2(mm)|
To calculate calculate reflex angle use
Reflex Angle= 360-|30(hh)-11/2(mm)|
Thangarajesh said:
1 decade ago
Angle between 2 hands = 30 hours - 11/2 minutes
= 30 (10)- 11/2 (25)
=162.5 degree
Reflex angel = 360 - angle between 2 hands
= 197.5
= 30 (10)- 11/2 (25)
=162.5 degree
Reflex angel = 360 - angle between 2 hands
= 197.5
Panneerselvam said:
8 years ago
Reflex angle = 360-[(11/2)*m-30*hr],
=360-[(11/2)*25-30*10],
=360-[137.5-300],
=197.5.
Note: degree between hr and min hand shortcut formula : (11/2)m-30*hr.
=360-[(11/2)*25-30*10],
=360-[137.5-300],
=197.5.
Note: degree between hr and min hand shortcut formula : (11/2)m-30*hr.
Mohan said:
1 decade ago
Short cut:
use this formula...
angel=(11/2)*min-30*hr........(1)
here hr=10 min=20 ref_angle=360
from (1)
angel=162.5
360-162.5=197.5....am i right....
use this formula...
angel=(11/2)*min-30*hr........(1)
here hr=10 min=20 ref_angle=360
from (1)
angel=162.5
360-162.5=197.5....am i right....
Sangay Dorji said:
5 years ago
10.25 means: 10hrs + 0.25 hrs.
Therefore, it can be written as 10hrs+(25/60)hrs.
Make the L.C.M as 60, then it will become ((10 * 60) + (25))/60 = 125/12 hrs.
Therefore, it can be written as 10hrs+(25/60)hrs.
Make the L.C.M as 60, then it will become ((10 * 60) + (25))/60 = 125/12 hrs.
Venu said:
8 years ago
Hour : 10*30=300degre.
25*0.5or1/2=15.5,
+=312.5,
Minute : 25*6=150,
312.5-150=162.5,
360-162.5=197.5 answer.
25*0.5or1/2=15.5,
+=312.5,
Minute : 25*6=150,
312.5-150=162.5,
360-162.5=197.5 answer.
Shivanand sattikar said:
9 years ago
Answer to this and formula to this is as simple as this (360 - (30h - (11/2) * m) ) that's all.
For this question 360 - 162.5 = 197.5, as simple as that.
For this question 360 - 162.5 = 197.5, as simple as that.
Yasin said:
1 decade ago
@B.Vamsi Srinivas
final result you have to subtract from 360degree's
now
i mean yoy got finally 162 1\2
360-162 1\2=197 1\2
this is simple processes.
final result you have to subtract from 360degree's
now
i mean yoy got finally 162 1\2
360-162 1\2=197 1\2
this is simple processes.
Harshit dhiman said:
1 decade ago
But in the above question, according to formula (60Xh-11Xm)/2.
(60X10-11X25)/2.
(600-275)/2.
375/2.
= 162.5.
Reflex angle = 360-162.5 = 197.5.
(60X10-11X25)/2.
(600-275)/2.
375/2.
= 162.5.
Reflex angle = 360-162.5 = 197.5.
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