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

Question

Philoid · Accepted Answer

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.