Post a and post b are 120 meters apart. post b and post c are 300 meters apart. ben cycled from post a to post b in 15 seconds. then he cycled from post b to post c in 55 seconds. find ben's average speed for the distance from post a to post c.

The formula for Velocity(speed) is delta x/ delta t or a change in distance(magnitude) over a change in time. The formula goes as follows X^2 -X^1 / T^2-T^1 so 300-120/55-15 --> 180/40 --> 4.5 m/s(avg. speed).

4.5

Step-by-step explanation:

c. 4 and 1/2 pounds is the answer! : )