Samir begins riding his bike at a rate of 6 mph. Twelve minutes later, Chris leaves from the same point and bikes along the same route at 9 mph. At any given time, t, the distance traveled can be calculated using the formula d = rt, where d represents distance and r represents rate. How long after Chris begins riding does he catch up to Samir?

Answer 1

d1 = r*t = 6mi/h * (12/60)h = 1.2 Miles
head start.

d2 = d1 + 1.2 mi.
9t = 6t 1.2. Solve for t in hours.

Answer 2

1 = r*t = 6mi/h * (12/60)h = 1.2 Miles
head start.

d2 = d1 + 1.2 mi.
9t = 6t 1.2. Solve for t in hours.

Answer 3

can you be more specific