A van 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?
Choose one: A) 50 kmph B) 60 kmph C) 70 kmph D) 80 kmph E) 20 kmph

Rationale: "time = 6 distence = 180 3 / 2 of 6 hours = 6 * 3 / 2 = 9 hours required speed = 180 / 9 = 20 kmph e"
Answer: E