I had to catch a bus which was 225 m ahead of me. The bus also started at the same time. If the speed of the bus was 2.5 m/sec and my speed was 36 kmph, in how much time can i catch the bus?
a)20 seconds b)25 seconds c)30 seconds d)40 seconds

• Relative velocity:
  { (36*5/18) - 2.5 }
  which is 7.5 m/sec
  So required time,
  Distance of separation/relative speed
  which is
  225/7.5
  30 sec is the answer.
  
• 9 years agoHelpfull: Yes(1) No(0)