Question

how far does the tip of a minute hand move in 40 minutes if the minute hand is 15 cm long

Answer 1

Answer:

I Guess this is the answer (cuz i am a 9th grader)

Step-by-step explanation:

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.

Answer 2

Answer:

Step-by-step explanation:

radius of the minute hand = 15 cm

angle covered in 40 minutes = 240 = 4$\pi$/3

L=R*angle

L=15*4$\pi$/3

L=20 $\pi$