A thief started his journey at a speed of 60 km/h. After 30 minutes, police started from the same place but at a speed of 80 km/h. How much time (in hours) will the police take to catch the thief?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (3/2) hours
Thief's initial speed = 60 km/h
Police's speed = 80 km/h
Time elapsed before police starts (T) = 30 minutes = 0.5 hours
Distance = Speed × Time
Time take by police to catch the thief = (60 × 0.5)/(80 - 60) = 30/20 = 3/2 hr