Question

The number of times in a day the hour-hand and the minute-hand of the clock at right angle is​

Answer 1

Answer:

44.

Explanation:

In a 12 hour period, the minute hand makes 12 revolutions while the hour hand makes one. If you switch to a rotating coordinate system in which the hour hand stands still, then the minute hand makes only 11 revolutions, and so it is at right angles with the hour hand 22 times. In a 24 hour day you get 2×22=44.

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