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.
To find the distance Brian ran in 18 minutes, we can use the ratio:
Distance in 18 minutes / Distance in 40 minutes = Time in 18 minutes / Time in 40 minutes
Let's solve for the distance in 18 minutes:
(Distance in 18 minutes) / 5 km = 18 minutes / 40 minutes
Cross-multiplying, we get:
(Distance in 18 minutes) = (18 minutes / 40 minutes) * 5 km
Simplifying:
(Distance in 18 minutes) = (9/20) * 5 km
Calculating the result:
(Distance in 18 minutes) = 2.25 km
Therefore, Brian ran 2.25 kilometers in 18 minutes.
To find out how far Brian ran in 18 minutes, we can use the concept of speed. Speed can be defined as distance divided by time.
First, let's find Brian's average speed during the 5-kilometer race. We can do this by dividing the total distance by the total time:
Speed = Distance / Time
Speed = 5 kilometers / 40 minutes
Now, to find how far Brian ran in 18 minutes, we can use the same average speed:
Distance = Speed * Time
Distance = (5 kilometers / 40 minutes) * 18 minutes
Calculating this:
Distance = (5/40) * 18
Distance = 0.125 * 18
Distance = 2.25 kilometers
Therefore, Brian ran 2.25 kilometers in 18 minutes.
To find out how far Brian ran in 18 minutes, we can set up a proportion using the information given.
Since we know that Brian ran 5 kilometers in 40 minutes, we can set up the following proportion:
5 km / 40 min = x km / 18 min
To solve for x (the distance Brian ran in 18 minutes), we can cross multiply:
40 min * x km = 5 km * 18 min
This simplifies to:
40x = 90
Now, we can solve for x by dividing both sides of the equation by 40:
x = 90/40
Simplifying further:
x = 2.25
Therefore, Brian ran 2.25 kilometers in 18 minutes.