It took Liam 15 minutes to ride his bike three miles. Convert this ratio into a unit rate by finding how long many minutes did he take to travel one mile.
A 5 minutes/mile
B 1/5 miles/minute
C 1/5 minutes/mile
D 5 miles/minute
To convert the ratio into a unit rate, we divide the time (in minutes) by the distance (in miles). In this case, Liam took 15 minutes to travel 3 miles, so to find how long it took him to travel one mile, we divide 15 minutes by 3 miles.
15 minutes / 3 miles = 5 minutes/mile.
Therefore, the correct answer is:
A) 5 minutes/mile.