A car takes 6 hours to cover a distance of 180 Km. how much should the speed in Kmph be maintained to cover the same direction in 3/2th of the previous time? Select the correct option:
A) 10 kmph  B) 20 kmph  C) 15 kmph  D) 30 kmph  E) 25 kmph

Rationale: "time = 6 distance = 280 3 / 2 of 6 hours = 6 * 3 / 2 = 9 hours required speed = 180 / 9 = 20 kmph b )"
Answer: B