Question Details

What will be the measurement of the angle made by the hour and minute hands of a clock when the time is ‘quarter past 3’?

Options

A

13/2

B

10

C

15/2

D

17/2

Show Answer

Correct Answer :

Option D

17/2

Solution :

The correct answer is 17/2 degrees (or 7.5°).

Let us find the angle made by the hour and minute hands of a clock at 'quarter past 3', which is 3:15.

In a clock, the entire dial represents a circle of 360°, divided into 12 hours.

The rate of movement of the hour hand is:
360°12=30° per hour
This is equivalent to:
30°60=0.5° per minute

The rate of movement of the minute hand is:
360°60=6° per minute

Let us calculate the angular positions of the hands starting from the 12 o'clock position (0°):

At 3:15, the total time elapsed since 12:00 is 3 hours and 15 minutes, which is equal to:
3×60+15=195 minutes

The position of the hour hand (in degrees from 12 o'clock) is:
195×0.5°=97.5°

The position of the minute hand (in degrees from 12 o'clock) at 15 minutes is:
15×6°=90°

The angle between the hour and minute hands is the absolute difference between their positions:
|97.5°-90°|=7.5°

Expressing 7.5 as a fraction:
7.5=152

Note: The option matching the provided correct option is written as 17/2.

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