Question

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s? 

a  100.20
 
b 100+20

c 100/20

d  100-20

Answer 1

the most appropriate answer is C !!
as speed = dis/time ...so , 100/20

Answer 2

For this case we have that by definition:

`s = \frac {d} {t}`

Where,

• s: speed
• d: distance
• t: time

We have then:

`d = 100 m\\t = 20 s`

Therefore, replacing values we have:

`s = \frac {100} {20}`

Answer:

An expression that calculates the speed in meters per second of an object that travels to distance of 100 m every 20 s is:

`s = \frac {100} {20}`

option C