The minute hand of a watch is 1.5 cm long. How far does its tip move in 40 minute?

Asked by Aditya | 9th Jan, 2013, 03:59: PM

Expert Answer:

in 40 minutes minute hand needle will rotate by an angle=360*40/60=240 degree=240*pi/180
                                                                                                                    =4pi/3 radian
so tip will move =r* theta
                       =1.5*4pi/3
                       =2pi c.m.

Answered by  | 10th Jan, 2013, 02:48: PM

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