Our Blaster friend Sara CyberSatellite is practicing today for a BIG race this upcoming weekend. To help make sure she is ready to excel tomorrow, Sara needs to time herself and see how long it will take her to complete the race. Normally, Sara only races one lap when she goes on the Shooting Star Strip. For this huge Racer rally, however, she will have to go for a solid THREE laps!
Sara’s target time for this race is to reach the finish line in under 3:30. To see if she needs to practice looping through the course, let’s help Sara predict her estimated finish time tomorrow using speed, distance, and time.
The first thing we need to do is calculate how long it takes Sara to complete one lap of the Shooting Star Strip. Are you ready to start your timers? Ready… Set… Go!
Sara sure is one speedy driver! She finished the course in a time of 1:20. First, let us convert her time to seconds so that it will be much easier for us to use. Since a minute is 60 seconds long, that means she came in at a total of 80 seconds.
Now we can calculate her rate! This is actually very easy. Think of rates as a type of ratio, where we have distance on the left side and time on the right side. This gives Sara a rate of 1 loop per every 80 seconds (or 1:80).
Next, let us find out her predicted time! To do this, we multiply both sides of the fraction by 3, which gives us 3 loops per every 240 seconds.
Now it is time for us to convert our 240 seconds into minutes, which we can do by using our long division skills. Take 240 and divide it by 60 to get our final answer.
So did Sara beat her target time of 3 minutes and 30 seconds? Comment below with the answer and tell us what her predicted time is!