Question

The minute hand of a clock is 21 cm long. The distance moved by the tip of the minute hand in 1 hour is
(a) 21π cm
(b) 42π cm
(e) 10.5π cm
(d) 7π cm
Assume
$\pi = 22 \div 7 \: unless \: stated \: otherwise$
​The question is from Area Related to Circles.
Of 10 class.

Answer 1

Answer:

42π cm

Step-by-step explanation:

A minute hand in an hour takes one complete circle.

So, distance moved by the tip of minute hand is equal to the circumference of the circle (formed by the tip of minute hand in an hour)

Distance = 2πr

= 2π × 21 cm

= 42π cm

Answer 2

Answer:

42 pie is the correct answer

Step-by-step explanation:

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