A thief, seeing a policeman from a distance of 120 metres, starts running at a speed of 7 km/h. The policeman chases immediately with a speed of 8 km/h and the thief is caught. What is the distance run by the thief?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 840 m
Given that
Initially,, the distance between Police and a thief = 120 m
The speed of thief = 7 km/h
The speed of thief = 8 km/h
Formula used
Time taken to catch the thief = Distance between them/Relative speed
Calculation
The relative speed = 8 - 7 = 1 km/h
Time taken to catch the thief = 0.120/1 = 0.12 hours
Hence, the distance travelled by thief = 7000 × 0.12 = 840 m