Question

this question has two parts. first, answer part a. then, answer part b. part a speed changing over distance the graph shows how a cyclists speed changed over a 0.25 - h trip. what is the cyclists average speed? 2 km/h 30 km/h 20 km/h 8 km/h

Explanation:

Step1: Recall average - speed formula

The formula for average speed is $v_{avg}=\frac{d}{t}$, where $d$ is the total distance and $t$ is the total time.

Step2: Identify values from the problem

From the problem, the total distance $d = 5$ km and the total time $t=0.25$ h.

Step3: Calculate average speed

Substitute the values into the formula: $v_{avg}=\frac{5}{0.25}=20$ km/h.

Answer:

20 km/h