Answer:
It will take you 1/2 hour to catch up.
Step-by-step explanation:
We Know
You are biking at a speed of 18 miles per hour.
You are 3 miles behind your friend, who is biking at a speed of 12 miles per hour.
The equation will be:
18h = 12h + 3
Find the amount of time it takes for you to catch up.
18h = 12h + 3
6h = 3
h = 3/6 = 1/2 hour
So, it will take you 1/2 hour to catch up.