# 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:

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.
Deep said:
1 decade ago

How 17/2 came please anyone answer?

Prasad said:
1 decade ago

17/2 = 8.5 but 8hr 30min, so how it's came 17/2 ?

Why we use this? can any one tell me please?

Why we use this? can any one tell me please?

Sundar said:
1 decade ago

Hi @ALL

Let me explain.

17/2 = 8.5 = 8 hours + 0.5 hours

= 8 hours + 1/2 hours

= 8 hours + 1/2 x 60 mins (.: 1 hour = 60 mins, Therefore, 1/2 hours = 30 mins)

= 8 hrs 30 min.

Therefore, we can write 8-hrs 30-min as 17/2.

While solving problems, make all numbers in vulgar fraction, it will be easy to solve problems quickly.

For example: 360/12 x 17/2 = ?

It is easy to solve. Have a nice day!

**We can write 8.30 as 17/2 hours.**Let me explain.

17/2 = 8.5 = 8 hours + 0.5 hours

= 8 hours + 1/2 hours

= 8 hours + 1/2 x 60 mins (.: 1 hour = 60 mins, Therefore, 1/2 hours = 30 mins)

= 8 hrs 30 min.

Therefore, we can write 8-hrs 30-min as 17/2.

While solving problems, make all numbers in vulgar fraction, it will be easy to solve problems quickly.

For example: 360/12 x 17/2 = ?

It is easy to solve. Have a nice day!

Shekhar bhakat said:
1 decade ago

Try this formula it can solve any tipe of clock related problem.

Angle b/w two handes of the clock= (11/2) *min-30*hr;.

Angle b/w two handes of the clock= (11/2) *min-30*hr;.

Ndd said:
1 decade ago

8hr+30/60=17/2.

Marati Raju said:
1 decade ago

It is . . . . Very simple

by the Formula:

30H-[11/2]M

at 8.30

i.e 240-165=75degrees

I hope that every one understood this . . . . .

by the Formula:

30H-[11/2]M

at 8.30

i.e 240-165=75degrees

I hope that every one understood this . . . . .

Nagmani Sinha said:
1 decade ago

We can use other formula too...

30h-6m

where:

H=total hours including minute parts...

m=minutes

in above qn it would be

30*17/2-6*30=255-180=75;

Hope its easier formula.

30h-6m

where:

H=total hours including minute parts...

m=minutes

in above qn it would be

30*17/2-6*30=255-180=75;

Hope its easier formula.

Suresh said:
1 decade ago

Hours hand should be calculated by considering

hours Hand -( 8 * 360/12)= 240 deg

Minutes Hand - ( 30 * 360/60) = 180 deg

Total angle b/w Hour and Min = 240 -180 = 60 deg.

This is Practically as per the clock system.

hours Hand -( 8 * 360/12)= 240 deg

Minutes Hand - ( 30 * 360/60) = 180 deg

Total angle b/w Hour and Min = 240 -180 = 60 deg.

This is Practically as per the clock system.

Naveen said:
1 decade ago

Can we write 17/2 we also write this 34/4 that is also equals.

Shoubhick said:
1 decade ago

Hey guys...

no need to apply any formula..

just look at any clock,each division(1/12) is 360/12=30 deg,and 1/24 division is 15 deg,so in 8:30--> 30+30+15=75 deg

no need to apply any formula..

just look at any clock,each division(1/12) is 360/12=30 deg,and 1/24 division is 15 deg,so in 8:30--> 30+30+15=75 deg

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