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The minute hand of a clock is 14 cm long.
Find the area it sweeps in 30 minutes (half a revolution). (Take π = $\frac{22}{7}$ )

Class 7Area of a CirclePerimeter and Area

A616
B278
C338
D308

Step-by-Step Solution

In 30 minutes the hand sweeps a semicircle of radius 14 cm. Area =

\frac{1}{2} * \frac{22}{7} * 14 \times 14 = \frac{616}{2} = 308 cm^{2}

.

Answer: D) 308

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