Question

Find the angle formed by the arms of a clock at 9 O’clock.

Answer 1

We know that sum of angles at a point = 360° and on the face of a clock there are 12 marks on it.

Now at 9 O’clock, the hour hand is on 9 while minute hand is at 12

∴ Angle between them `= 9/12 xx 360^circ = 270°`