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Mirror Formula Formal Proof

Two and a qua...

Question

Two and a quarter hours back, when seen in a mirror, the reflection of a wall clock without number markings seemed to show 1 : 30. What is the actual current time shown by the clock?

A

8 : 15

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B

11 : 15

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C

12 : 15

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D

12 : 45

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Solution

The correct option is D 12 : 45
(d)

Mirror image of 01 : 30 is 10 : 30
10 : 30 was the time two and quarter hour back

So time now will be 12 : 45

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