The large hand of a clock Is 42 cm long. How many centimetres does its extremity move in 20 minutes?
For 20 minutes = θ = 4 x 30° = 120°
We know that l = r × θ
l = 
Therefore, the length is equal to 88 cm.
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The large hand of a clock Is 42 cm long. How many centimetres does its extremity move in 20 minutes?
For 20 minutes = θ = 4 x 30° = 120°
We know that l = r × θ
l =
Therefore, the length is equal to 88 cm.