Respuesta :

GeorgePP

Answer:

Explanation:

d = rt only works for calculating average speeds.

100 = r(140)

r = 0.714 m/s

syeseo00

Answer: 0.71m/s

Explanation:

Formula: Speed = Distance/time

Speed = 100m/140s

Speed = 100/140 / 20/20

Speed = 5/7 or 0.71m/s