Afc0892 wrote:
A policeman chases a thief at a speed of 27kmph and catches him after 1 minute and 36 seconds. If the distance between the Policeman and the thief was 240 meters initially, What's the speed of the thief?
1) 6Kmph
2) 9Kmph
3) 12Kmph
4) 18Kmph
5) None of these
OA: D
\((V_{Policeman}-V_{Thief})* Time = Distance \quad b/w \quad Two\)
\((27-V_{Thief})* (\frac{1}{60}+\frac{36}{60*60}) = \frac{240}{1000}\)
\((27-V_{Thief})* (\frac{96}{60*60}) = \frac{240}{1000}\)
\((27-V_{Thief})* (\frac{96}{3600}) = \frac{24}{100}\)
\((27-V_{Thief})= \frac{24}{100}*\frac{3600}{96}\)
\((27-V_{Thief})= \frac{24*36}{96}=9\)
\(27-V_{Thief} = 9, V_{Thief}= 27-9= 18\) Km\hr