Homework Help

If the minute hand of a big clock is 1.12 m long, find the rate at which its tip is...

user profile pic

mahmuda092569 | Student | (Level 2) Honors

Posted January 31, 2011 at 2:10 AM via web

dislike 1 like

If the minute hand of a big clock is 1.12 m long, find the rate at which its tip is moving in centimeter per minute.

1 Answer | Add Yours

user profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted January 31, 2011 at 2:22 AM (Answer #1)

dislike 1 like

The minute hand of a clock completes 1 circle in a minute. As the length of the minute hand is 1.12 m, the tip moves in a circle with a circumference of 2*pi*1.12 = 2.24*pi m.

This distance is covered in 1 minute

Therefore the rate of the tip of the minute hand in centimeter per minute is 2.24*100*pi cm/min

Rate in cm/min = 224*pi cm/min

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes