Aptitude - Clock - Discussion

Hi IndiaBix Users,
It is a Cool Question;Just we have to apply the concept exactly to the analysis in this problem.
Thank You for all those who helped the solvers.
We usually measure angles in anti-clockwise direction.
So,the angle which is the major part in the rotation is measured as reflex angle,and mostly it is between 180 and 360 degrees.

Hi guys..
10.25 it can be written as in hrs.
(10+25/60)=(10+5/12)=(125/12).

Why we written .25 as 25/60 bcoz 10 is already in hrs.to change .25 min into hrs?

we divided by 60.

10.25=10hrs 15 minutes
bcoz it is in decimal,
we have to convert it into hrs and minutes

In a clear manner to explain about 125/12 is for 10 the angle is 10*30 = 300.

That is hours hand cover 30 degrees in one hour duration.

In the same way within 25 minutes it cover ((30/12) *5 = 12.5).

So that the angle is 312.5 degrees.

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....

Hour hand is at 10.25 and min hand is at 5.
Forget about min hand. Take 10.25 o clock as a refrence point and move hour hand towards 5 o clock.Here 5 is final point suppose.So hour hand will travel a total of 6.35 hours.In each hour angle formed if 30.So 6.35*30 = 190'30". MY answer is wrong but i dont think that i have made mistakes.
PLEASE DO TELL ME WHAT I AM DOING WRONG........

@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.

I don't know people are so confused over these small problem let me make you all clear. Hear we know 60 min = 360 degree.

& 12 hrs =360 degree.

When time is 10.25 it means hour hand is slight ahead 10 not exactly at 10 so 10.25 = 125/12 as said earlier so calculating angle using hour relation by unitary method its getting 312.5.

Now calculate the angle made by minute hand i.e 25 minutes it makes (360=60) *25=150 draw a clock and see the angle made by hour that is 312. 5 degree from 12 o clock and similarly see the angle made by minute hand its 150 degree from 12 0 clock here if reflex angle is asked so which is angle made by them in anticlockwise direction. Since clock rotates in clock wise direction. If you are not getting reflex angle just remember as anticlockwise concept. Hope you get it my friend.

Hey friends,

Reflex angle simply means opposite angle, for solving this problem first of all we have to find out the angle made between 10:25. After than this angle is subtracted in 360.

Angle made b/w 10:25 == (360/12 x 10 + 25 x 1/2) - 25x6 = 325/2

Than reflexive angle == (360 - 325/2) = 395/2 = 197,1/2

So, Ans(D).

Hey guys.

Reflex angle is nothing but the exterior angle.i.e. you got to subtract your angle with 360.
Here:
Using the formula : 30*h-11/2*m
30*10-11/2*25=162.5.

Reflex angle = 360-162.5 = 197.5.