Question

On a stopwatch, the tip of the second hand moves 2 cm in 15 seconds. How long is the second hand (to the nearest tenth)?

Answer 1

I can help

Answer 2

you there?

Answer 3

divide 8 by pi and 2 then that will give you the radius

Answer 4

yes thank you.

Answer 5

The length of the second had is the radius
4*2 cm is the Cirfumference

Answer 6

note that 15 seconds sweeps an angle of 90 degrees or pi/2 radians.