Question : The minute hand of a big clock is 1.05 m long. Find the rate at which its tip is moving in cm/min.
Doubt by Muskan
Solution :
Length of minute hand = r
r=1.05m
r=1.05×100 cm
r=105 cm
Distance covered by minute hand in one complete revolution.
= 2πr
= 2×(22/7)×105
=2×22×15
=660 cm
Time Taken by minute hand to complete one revolution
t = 60 minutes
Rate of movement of tip of minute hand
= Distance/time
=660/60
= 11 cm/min