Question

how many times in day ,two hands of a clock are at 90 degrees please. explain answer quickly
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Answer 1

Answer:

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. More mathematically, it can be done as : The minute hand moves 360 degrees in 60 minutes.

Answer 2

Answer:

it is a straight angle 90°.. I think this is my answer I can't able to say this is the right answer or not I don't know this is the right answer I think so