## Related questions with answers

Question

The dial of a standard clock has a 10 -centimeter radius. One end of an elastic string is attached to the rim at 12 and the other to the tip of the 10-centimeter minute hand. At what rate is the string stretching at 12:15 (assuming that the clock is not slowed down by this stretching)?

Solution

VerifiedAnswered 1 year ago

Answered 1 year ago

Step 1

1 of 4In order to solve this task remind yourself that the minute hand makes one revolution, so it makes $60$ revolutions per hour. Now, it is clear that minute hand makes an angle of $\alpha=\frac{\pi t}{30}$ radians. Also, to solve this task remind yourself about the cosine law.

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