Question

What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from (a) 3 to 9 (b) 4 to 7 (c) 1 to 10

Answer 1

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We may observe that in 1 complete clockwise revolution, the hour hand will rotate by 360°

(a) When the hour hand goes from 3 to 9 clockwise, it will rotate by 2 right angles or 180° or two right angles

(b) When the hour hand goes from 4 to 7 clockwise, it will rotate by 1 right angles or 90° or one right angle

(c) When the hour hand goes from 7 to 10 clockwise, it will rotate by 1 right angles or 90° or one right angle