Measures of the two angles between hour and minute hands of a clock at 9 O’ clock are

A complete circle is of 360° and a clock completes 12 hours in 1 cycle.

When its 9 O’ clock then


hour hand is at 9 and minute hand is at 12.


So, let’s consider the angle by minute hand to be 0 i.e., assuming 12 as the beginning point of counting.


is the angle covered by hour hand.


Angle between hour hand and minute hand is 270 – 0 = 270°


is the other direction it is 360-270 = 90°.


B is correct.

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