Question

8. Find the difference between the distance covered by the minute hand (3.5 cm) of a clock in one rotation. and hour hand 2. 1cm) of a clock of one rotation

Answer 1

Answer:

Each of them describe a circular path.

The hour hand :

It makes one revolution in 12 hrs

In 27 hrs it makes :

27/12 = 2.25 revolutions.

In one revolution it covers :

3.142 × 2 × 4 = 25.136 cm

In 2.25 revolutions it covers :

2.25 × 25. 136 = 56.556cm

The minute hand :

In one revolution it takes 1 hr.

In 27 hrs it makes 27 revolutions.

Distance covered in one revolution is :

3.142 × 2 × 5 = 31.42 cm

In 27 revolutions it covers :

27 × 31.42 = 848.34cm

The difference of the distances covered is :

848.34 - 56.556 = 791.784 cm

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