Answered

In order to determine speed, you must know 

a.time.
c.Both (a) and (b)
b.distance.
d.None of the above
 

Verified Answer :

The answer is c. Both a and b which is distance and time.

In order to get or determine the speed, we need to have both time and distance.

The formula would be :

speed =  distance / time

And here are another important note to get the time and distance

time = distance / speed

Distance = speed x time



It is always important to remember these 3 formulas to be able to solve given
situations about speed, time and distance.