A circular wall clock has a radius of 28 cm. Calculate the distance covered by the tip of the hour hand in 9 hours, assuming it is positioned at the edge of the clock face. Use $\pi = 22/7$.

Question

Accepted Answer

132 cm. The tip of the hour hand moves along a circle of radius 28 cm. In 12 hours it covers one full circumference, so in 9 hours it covers $9/12=3/4$ of the circle. Circumference = $2\pi r = 2\times \frac{22}{7}\times 28 = 176$ cm, and $3/4$ of this is 132 cm.

A circular wall clock has a radius of 28 cm. Calculate the distance covered by the tip of the hour hand in 9 hours, assuming it is positioned at the edge of the clock face. Use \(\pi = 22/7\).

Solution

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