Question

Calculate the speed of tip of minute hand of a clock whose length is 7cm

Answer 1

WE KNOW THAT,
SPEED=DISTANCE/TIME
HERE,
DISTANCE=2πr=43.96 CM=0.00044 KM
TIME=60 SEC=1 MIN=1/60 HRS

SPEED=43.96/1/60=0.00044×60=0.0264 KM/HR
                                                     =0.00733 M/S

Answer 2

Answer:

length = 7cm

=0.07m

time = 60 × 60

= 3600s

v = (2 × 22/7 × 7/100 ) /3600

= 44×1/100

= 44/100

= 11/25

= 0.44 cm

= 44 m