Vanessa and Richie are riding their bikes down a trail to the next campground. Vanessa rides at 16 mph while Richie rides at 3 mph. Since Vanessa is a little speedier, she stays behind and cleans up camp for 30 minutes before leaving. How long has Richie been riding when Vanessa is 5 miles ahead of Richie?
he has been riding for and hour. he had gone 1.5 miles after 30 minutes and Vanessa started biking. after 30 MORE minutes, he had gone 3 miles while she had gone 8 miles. 8-3=5.
