what is the average speed of a student 100cm/s Bernard 150 cm/s Chloe 50 cm/s Dev 75 cm/s Eduardo 125cm/s

100cm/s

Explanation:

Given the speed of the following students;

Bernard 150 cm/s

Chloe 50 cm/s

Dev 75 cm/s

Eduardo 125cm/s

Their average speed of a student will be the mean of their individual speed as shown:

Average speed = 150+50+75+125/4

Average speed = 400/4

Average speed = 100

Hence the average speed of a student is 100cm/s

ill do it for 100, also this isnt 80 its 40

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.