Stream of consciousness rationale: Distance covered by the car = 50 × 10 = 500 km
\ Speed = 500⁄5 = 100 km/hr
\ Speed gain = 100 – 50 = 50 km/hr
The question and answer pair are described below.
Q: A car finishes a journey in ten hours at the speed of 50 km/hr. If the same distance is to be covered in five hours how much more speed does the car have to gain?
Options:
(A) 8 km/hr
(B) 10 km/hr
(C) 12 km/hr
(D) 16 km/hr
(E) 50 km/hr
A: (E)