Brian ran a 5-kilometer race in 40 minutes. How far did he run in 18 minutes? Write your answer as a decimal and do not round.(1 point)
Km
To find the distance Brian ran in 18 minutes, you can set up a proportion comparing the distances with the corresponding times:
Brian's speed during the race is the same throughout the race. If we calculate his speed for the 5 km he finished in 40 minutes, we can determine how far he would run in 18 minutes.
First, let's find out how far Brian runs in one minute.
Distance (D) run in the full race = 5 km
Time (T) taken to complete the full race = 40 minutes
Speed (S) = D/T
S = 5 km / 40 minutes
S = 0.125 km/minute
Now we know the speed, we can calculate how far he runs in 18 minutes.
Distance in 18 minutes = Speed × Time
Distance in 18 minutes = 0.125 km/minute × 18 minutes
Distance in 18 minutes = 2.25 km
As a decimal, without rounding, Brian ran 2.25 kilometers in 18 minutes.