Ava is competing in a 200 m race. She runs at a constant speed of 5.6 m/s for the first 50 m, then 4.6 m/s for 20 seconds. The remainder of the race takes her 26 seconds to complete. What is Ava's average speed for the entire race to 1 dp?

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.

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130