the minute hand of a wall clock is 4.2cm long. find the area swept by its in 20 minute
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Answered by
5
Answer:
angle made in 20 min = 120 degree
area swept = (120 * 22 * 42 * 42)÷(360 * 7 * 10 * 10)
= 18.48 cm sq.
Answered by
0
Answer:18.46cm^2
Step-by-step explanation:
Angle made by minute hand is 20/60×360°=120°
Area = π(4.2)^2÷360°×120°=18.46cm^2
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