Problema Solution
Bart is fleeing the scene of a bank robbery at 70mph. Thirty minutes after he leaves, a police helicopter leaves the scene to catch him, traveling 100mph along the same route. How many hours will Bart have been traveling when the police catch up?
Answer provided by our tutors
let time require is x
so distance covered by Bart=70(x+1)
while distance covered by helicoptor=100x
100x=70(x+1)
=> 30x=70
=> x=7/3=2.33 he
thus after 2 hr and 20 min heli will catch the theif