Car A leaves City X traveling east at 50 mph. One hour later, Car B leaves City X traveling east at 70 mph. How many hours after Car B leaves will it take for Car B to catch up to Car A?

✓ Correct Answer: Option C

When Car B leaves, Car A has traveled 50 miles (50 mph * 1 hr). Car B travels faster than Car A by 70 - 50 = 20 mph (relative speed). To cover the 50-mile gap, Car B will take 50 miles / 20 mph = 2.5 hours.