Posted by Olivia on Saturday, November 24, 2012 at 5:13am.
A runner is 22 km east and 15 km south of his starting point, how long would it take him to return to his starting point in a direct Line if he can run at 10 km per hour?

Math  drwls, Saturday, November 24, 2012 at 6:41am
When starting the return, the straightline distance from the starting point is:
sqrt[(22)^2 +(15)^2] = 26.63 km
Divide that by the speed for the time required, and you get
2.663 hours, whiich is 2 hours, 40 minutes

Math  Olivia, Saturday, November 24, 2012 at 7:51am
Thank you :)
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