The tip of the minute hand travel 22π in 1 hour. Find the length of the minute-hand.
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Step-by-step explanation:
Let the length h of minute hand be x.
Distance moved by it in 1 hour = circumference of a circle with radius x.
Circumference of a circle= 2 * π * r
Circumference= 2 * π * x
= 2πx
But, the distance moved by it is 22π
=> 2πx= 22π
=> x = 22π/2π
=> x = 11
Therefore, the length of the minute hand is 11 cm in length.
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