At 9:30 A.M. Andrew left Exeter for Portsmouth, cycling at 12 miles per hour At 10:00 A.M. Stacy left Portsmouth for Exeter, cycling at 16 miles pewr hour. The distance from Exeter to Portsmouth is 20 miles. At what time did they meet?

Answer 1

When they meet, they will have travelled a combined distance of 20 miles. Let t be the time (in hours)after Andrew starts at 9:30.
12 t + 16 (t-0.5) = 20
28 t -8 = 20
28 t = 28
t = 1 hour