Answer: 3.6 meters per second
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Step-by-step explanation:
The first 50 meters of the race is ran at a constant speed of 5.6 m/s.
Let's compute the time taken for this portion
distance = rate*time
time = distance/rate
time = 50/(5.6)
time = 8.92857
It takes approximately 8.92857 seconds to run the first 50 meters (at a constant speed of 5.6 m/s).
Add on the other time values from the other sections (20 and 26) to get 8.92857+20+26 = 54.92857
The entire 200 m race takes about 54.92857 seconds.
So Ava's average speed over the entire race is about 200/(54.92857) = 3.641092 which rounds to 3.6 m/s when rounding to one decimal place.