Q. 17.     The minute hand of a circular clock is 15\; cm long. How far does the tip of the minute hand move in 1 hour. (Take\pi =3.14)

Answers (1)

It is given that minute hand of a circular clock is 15\; cm long  i.e. ( r = 15 cm)

Now, we know that one hour means a complete circle of minute hand

Now,

Circumference of circle = 2 \pi r

\Rightarrow 2 \pi r = 2 \times 3.14 \times 15 = 94.2 \ cm

Therefore,  distance cover by minute hand in one hour is  94.2 cm

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