Aclockseenthroughamirrorshows‘quartertoseven’. Whatisthecorrect time shown by the clock?
Correct Answer :
5:15
Solution :
The correct option is 5:15.
To understand why this is the correct time, let's analyze the behavior of a mirror reflection of an analog clock. When a clock is reflected in a mirror, its left and right sides are reversed, while the top (12 o'clock) and bottom (6 o'clock) positions remain unchanged. This horizontal reflection means that a position on the clock face at hours corresponds to a reflected position of hours (or when calculating with minutes).
Let's break down the given mirror time, which is "quarter to seven".
"Quarter to seven" is written digitally as 6:45.
In this position:
- The minute hand is pointing exactly at 9 (which represents 45 minutes).
- The hour hand is close to 7, slightly past the midway mark between 6 and 7.
Now, let's find the real time by reflecting these positions horizontally:
1. Minute Hand: The minute hand is at 9 (on the left side). Reflecting it horizontally across the vertical 12-6 axis moves it to 3 (on the right side). A minute hand pointing at 3 represents 15 minutes past the hour.
2. Hour Hand: The hour hand is just before 7. Reflecting this position across the vertical axis moves it to the corresponding position on the right side, which is just after 5 (since 7 is 1 unit past 6, its reflection is 1 unit before 6, which is 5). Thus, the hour hand points slightly past 5.
Alternatively, we can use the subtraction formula:
Subtracting the minutes:
Subtracting the hours:
This gives us the actual time of 5:15.
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