Respuesta :

Answer:

5m/s

Step-by-step explanation:

Rate = distance/time

given that

distance=400 m

time= 1 min. 20 sec= 60+20=80 sec

rate= 400 m / 80 s= 5m/s

So average rate  is 5 m/s

hope it helps! have a great day!

PunIntended

Answer:

5 m/sec

Step-by-step explanation:

Let's first convert 1 min 20 sec into only seconds: 1 min = 60 sec --> 60 + 20 = 80 sec

So, Sydney ran 400 meters in 80 seconds. To find out her rate in meters per second, we need to divide 400 by 80: 400/80 = 5

Thus, her average rate was 5 meters per sec.

Hope this helps!

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