A flamboyant comic book villain has abducted a bystander! Captain Valiant is alerted to the crime and reaches the start of the villain's trail 30 minutes later. The villain is in a getaway car going 40 kmph, and Captain Valiant can fly at 50 kmph. How long will the bystander have to wait for rescue?
Choose the correct choice from the following answers.
A) 1 hour  B) 1 1/2 hours  C) 2 hours  D) 2 1/2 hours  E) 3 hours
Distance covered by the villain in 1/2 hour = 20 km   Now, 10 km is compensated in 1 hour   Therefore 20 km will be compensated in 2 hours   Added to the half hour head start, the bystander has been kidnapped for 2 1/2 hours.   Correct Answer: 2 1/2 hours
<result>D</result>
A flamboyant comic book villain has abducted a bystander! Captain Valiant is alerted to the crime and reaches the start of the villain's trail 30 minutes later. The villain is in a getaway car going 40 kmph, and Captain Valiant can fly at 50 kmph. How long will the bystander have to wait for rescue?