Aptitude - Clock - Discussion

Discussion Forum : Clock - General Questions (Q.No. 12)
12.
The angle between the minute hand and the hour hand of a clock when the time is 8.30, is:
80°
75°
60°
105°
Answer: Option
Explanation:

Angle traced by hour hand in 17 hrs = 360 x 17 ° = 255°.
2 12 2

Angle traced by min. hand in 30 min. = 360 x 30 ° = 180°.
60

Required angle = (255 - 180)° = 75°.

Discussion:
42 comments Page 1 of 5.

Nisar said:   10 months ago
How 17/2 came? Explain, please.

Simran Dhaliwal said:   2 years ago
8:30.
By formula:
Hr-8, min -30.

angle-(11/2) * min-30*hr.
Angle=(11/2) * 30-30*8=165-240=-75.
(1)

Durga Prasad ullingi said:   2 years ago
6:30 + 2:00
20/2 + 2 * 30 = (15+60) = 75.

Manisha said:   2 years ago
Can anyone explain, how the angle traced by hour hand is 360/12 and angle traced by minute hand is 360/60?

Ravi Sharma said:   4 years ago
We can use this formula for this type of questions.

Angle= 30H - (11/2)*M.
Where H is hour and M is minute.
So, 30*8- (11/2)*30 = 75 ans.

Note: If the answer is minus then ignore minus or reverse this formula.

Dibyaranjan sahoo said:   4 years ago
30 * 8 - 11/2 * 30,
240-165.
= 75.

Spartan said:   4 years ago
Here we have to find angle b/w 8.30.

The speed of minute hand= 6.
The speed of hour hand = 0.5.

The distance b/w each no is =30 i.e, 360%12 = 30;.

Sol : Hour hand: 8*30 = 240.
And 30*0.5 = 15.
Minute Hand
30*6 = 180.
255 - 180 = 75.

Anomiee said:   4 years ago
@Asinha.

8.30 hrs = 8hrs+30mins.
= ( 8+(30/60) )mins.
= (8+1/2)mins= 17/2 minutes.

ASinha said:   4 years ago
How to calculate angle in 8:35?

Could anyone help me out?

Ace said:   5 years ago
It is very easy new method.

In 1 minute your hand covers 1/2° while minute hand 6°.

Multiply 30 (1/2) for degree covered by your hand =15°.

And 10 min (6°) for degree by minute hand=60°.

Just add them 60+15=75°.

Any doubts.


Post your comments here:

Your comments will be displayed after verification.