# A wall clock has its minute hand of length 21 cm. What area will it swept in covering 30 minutes?

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A wall clock has its minute hand of length 21 cm. What area will it swept in covering 30 minutes?
posted Dec 8, 2020
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## 1 Answer

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693 cm2
.
In 30 minutes the hand will cover half a circle with a radius of 21 cm.
Thus 0.5 * pi * 21^2 = 693 cm2

answer Dec 10, 2020 by

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