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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