The length of minute hand of a clock is 7 cm the area swept by it in 30 minutes is
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Answer:
77 cm^2
Step-by-step explanation:
radius= 7cm
the minute hand swept 30 minutes,
it means that the area is a semi circle.
Area of semicircle= Πr²/2
= 22/7×7×7×1/2
= 11×7
= 77cm²
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