Time, Speed & Distance · Question 9 · Medium
Time, Speed & Distance question 9
A thief escapes on a bike at 40 km/h. Half an hour later, a police jeep starts chasing him from the same point at 50 km/h. How long after the jeep starts will it catch the thief?
- 2 hours
- 2 1/2 hours
- 4 hours
- 1 1/2 hours
Answer and explanation
Answer: A. 2 hours
Explanation: The thief's lead is 40 × 0.5 = 20 km. The jeep gains 50 − 40 = 10 km every hour, so it needs 20 ÷ 10 = 2 hours.
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