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’?
Correct Answer :
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:
This is equivalent to:
The rate of movement of the minute hand is:
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:
The position of the hour hand (in degrees from 12 o'clock) is:
The position of the minute hand (in degrees from 12 o'clock) at 15 minutes is:
The angle between the hour and minute hands is the absolute difference between their positions:
Expressing 7.5 as a fraction:
Note: The option matching the provided correct option is written as 17/2.
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