Question 4
jenna ran around the school's track with an average speed of 4 km/h. how can jill get a higher average speed than jenna?
a
she can run the same distance in a shorter amount of time.

b
she can run the same distance in a longer amount of time.

c
she can run twice the distance in twice the amount of time.

d
she can run half the distance in half the amount of time.

A. She can run the same distance in a shorter amount of time.

Explanation:

Speed can be computed with the formula:

Where:

v = speed

d = distance

t = time

So if you look at the formula, distance there tells you how far an object has traveled, and the time tells us how long it took to cover that distance. As you can see, speed and time are inversely proportional. This means that as one goes up, the other goes down. So if we reduce time travelling a certain distance, the speed increases.