A thief steals a car and drives it at 15 km/hr. The theft has been discovered after one hour and the owner of the car sets off in another car at 25 km/hr. When will the owner overtake the thief from the starting point?

A.

1 hr

B.

1.5 hr

C.

2 hr

D.

2.5 hr

• Let x be the time after which the man overtakes the thief's car.
  15x = 25(x-1)
  10x = 25
  x = 2.5 hrs
• 10 years agoHelpfull: Yes(0) No(2)
• 15 km x km
  -----------------------------------------------------
  O T OT
  
  {15+x}/{25}={x}/{15}
  x=22.5
  Total distance travelled by thief = 22.5+15 = 37.5
  T=D/S
  =37.5/15 = 2.5
• 4 years agoHelpfull: Yes(0) No(0)