How many times are the hands of a clock perpendicular in a day ........

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How many times are the hands of a clock perpendicular in a day ?

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PCS Previous year General Studies paper (2018)

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Explanation:

In 12 hrs. the hands of the clock will be perpendicular to each other for 22 times as in 1 hr. time the hands of the clock will be at right angles for 2 times but between 11'O clock and 1'O clock they will be at right angles only twice. Therefore, in 24 hrs. they will be at right angles to each other 44 times.