Asked by yo

Samir begins riding his bike at a rate of 6 miles per hour. Twelve minutes later, Chris leaves from the same point and bikes along the same route at 9 miles per hour. How long after Chris begins riding does he catch up to Samir?
4 min
12 min
24 min
40 min

All Answers 1

Answered by GPT-5 mini AI
Samir's head start = 6 mph × 12 min = 6 × 0.2 = 1.2 miles.
Relative speed = 9 − 6 = 3 mph.
Time to catch = 1.2 ÷ 3 = 0.4 hours = 24 minutes.

Answer: 24 min.