Question

In the minute hand of a clock is 3.5 cm long, find the distance covered by the tip of minute hand in 20 minutes​

Answer 1

Answer:

In 1 hour, minute hand completes one round means makes a circle.

Radius of the circle(r)=15cm

Circumference of circular clock=2πr

=2×3.14×15=94.2cm

Therefore, the tip of the minute hand moves 94.2cm in 1 hour.

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Answer 2

Answer

The length of the minute hand is equal to the radius of the circle the minute hand sweeps → 60 mins = Tr^2

→ 20 mins = nr^/3

substituting the values r = 3.5 cm

→ Tr^/3 = 12.828 cm^2

hope it will help you friend