
Mike D. answered 09/10/20
Effective, patient, empathic, math and science tutor
Jane
Suggest you measure the distance from your hand to the base of your brain.
Let's say it's 1 m.
Then at 25 m/s, will take 1/25 s .
1 millisec = 1/1000 s, so multiply be 1000 to get millisec
1/25 s = 1000 / 25 millisec = 40 millisec
Adjust this using the distance you measure
Mike