Aptitude - Clock - Discussion

Discussion Forum : Clock - General Questions (Q.No. 1)
1.
An accurate clock shows 8 o'clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 2 o'clock in the afternoon?
144°
150°
168°
180°
Answer: Option
Explanation:

Angle traced by the hour hand in 6 hours = 360 x 6 ° = 180°.
12

Discussion:
95 comments Page 10 of 10.

Vipin said:   1 decade ago
@Sarang !

If angle between minutes hand and Hour hand will be asked.
i.e.
Angle between Hour hand and minute hand at the time 2:13. etc.

Goutam pramanik said:   1 decade ago
Angle = 60*h/2.

Where, h=hour.

Sameer kashmiri said:   1 decade ago
360°/12 = 30°.

8 to 2 o'clock = 6 hrs.

30° * 6 = 180°.

Sarang said:   1 decade ago
Simple method :

Total hours between 8 am to 2pm (H) = 6 hours (normal counting)
minutes (M)=0.

Use this formula {angle= [30*H - (11/2)*M] }.

Where H= hours, M= minutes. Put the values
Angle = 30*6 - (11/2)*0.
= 180-0 = 180 degrees.

P.S. If minutes are given put that value in same formula.

Gowtham.s said:   1 decade ago
Explain every lines in detail:

In 60 minutes, the minute hand gains 55 minutes on the hour on the hour hand.

In every hour, both the hands coincide once.

The hands are in the same straight line when they are coincident or opposite to each other.

When the two hands are at right angles, they are 15 minute spaces apart.

When the hands are in opposite directions, they are 30 minute spaces apart.

Angle traced by hour hand in 12 hrs = 360°.

Angle traced by minute hand in 60 min. = 360°.

If a watch or a clock indicates 8.15, when the correct time is 8, it is said to be 15 minutes too fast.

On the other hand, if it indicates 7.45, when the correct time is 8, it is said to be 15 minutes too slow.


Post your comments here:

Your comments will be displayed after verification.