Question

Distance covered by minute hand in 1 hr is 94.20 cm.
1. Find the circumference of the circle whose radius
is:
(a)21 cm (b) 35 cm (c) 63 m (d) 49 m​

Answer 1

35cm is the answer

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Answer 2

Dear Student,

◆ Answer -

r = 15 cm

● Explaination -

Minute hand completes one full circle in 1 hour.

Distance covered by minute hand in 1 hour is equal to circumference of the circle.

Now, circumference of the circle is given by formula -

Circumference = 2 × π × r

94.20 = 2 × 3.142 × r

r = 94.20 / 6.284

r = 15 cm

Therefore, radius of the circle is 15 cm.

Thanks dear. Hope this helps you...