Caitilin Posted January 7, 2013 Share Posted January 7, 2013 Here's the question: Sam and Terry ran on the treadmill. Sam started 10 minutes before Terry. Terry finished 5 minutes before Sam. They both ran the same distance. When Terry finished, Sam had completed 4/5 of the journey and still had 1/2 mile to go. Find Sam's speed. Find Terry's speed. I don't feel like we have enough information to do this, or if we do, it's hidden in some way I can't see. :blushing: Any help? Quote Link to comment Share on other sites More sharing options...
EKS Posted January 7, 2013 Share Posted January 7, 2013 Here's the question: Sam and Terry ran on the treadmill. Sam started 10 minutes before Terry. Terry finished 5 minutes before Sam. They both ran the same distance. When Terry finished, Sam had completed 4/5 of the journey and still had 1/2 mile to go. Find Sam's speed. Find Terry's speed. Is this correct? Sam's speed: 0.1 miles/minute or 6 miles/hour Terry's speed: 0.25 miles/minute or 15 miles/hour Sam ran 0.5 miles in 5 minutes, therefore, assuming he ran a constant speed, he was running at 0.5 miles/5 minutes or 0.1 miles/minute or 6 miles/hour. The total distance was 2.5 miles, because 0.5 miles was 1/5 of the distance. Sam ran for a total of 25 minutes because it took him 5 minutes to complete 1/5 of the distance. It took Terry 10 minutes to run the total distance (he started 10 minutes after Sam and finished 5 minutes before). Therefore Terry's speed was 2.5 miles/10 minutes or 0.25 miles/minute or 15 miles/hour. Quote Link to comment Share on other sites More sharing options...
Caitilin Posted January 7, 2013 Author Share Posted January 7, 2013 Thanks, Kai! I find some of these too muddlesome for my word-oriented brain. :) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.