Please help I really don't get this!
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)?
1.3 cm
6.3 cm
12.6 cm
30.0 cm

Question

anonymous · Answer

1.3 cm

anonymous · Answer

15 Seconds is a quarter of the circle 2*4 equals 8 which id the diameter D=2pieRadius so 8/2pie gives the radius

sleepyjess · Answer

how do you get that 8 is the diameter isn't it saying that it moved this way since it says the tip of it moved 2 cm?|dw:1399222294268:dw|