A constable is 114 m behind a thief. The constable runs 21 m and the thief 15 m in a minute. In what time will the constable catch the thief?
16 min
17 min
18 min
15 min
19 min
Relative Speed = 21 - 15 => 6 m/minute
Time Taken to Catch = 114/6 => 19 minutes