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?
Choose the correct option:  A) 8 km/hr  B) 10 km/hr  C) 12 km/hr  D) 16 km/hr  E) 50 km/hr
Distance covered by the car = 50 × 10 = 500 km   \ Speed = 500⁄5 = 100 km/hr   \ Speed gain = 100 – 50 = 50 km/hr   Answer 50 km/hr
<result>E</result>
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?