Question

How much degrees does it take by hours hand when minutes hand rotate 180° in the same time.
a)90
b)60
c)15
d)20​

Answer 1

Answer:

90

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Answer 2

We recall that when a minute hand rotates $360^\circ$ then an hour hand rotates only $30^\circ$.

Given: A minute hand rotates $180^\circ$.

when a minute hand rotates $360^\circ$ then an hour hand rotates = $30^\circ$

when a minute hand rotates $180^\circ$ then an hour hand rotates = $\frac{30^\circ}{2}$

$=15^\circ$