A car takes 12 hours to cover a distance of 540 Km. how much should the speed in Kmph be maintained to cover the same direction in 3/4th of the previous time? Choose one.
A) 25 kmph B) 60 kmph C) 100 kmph D) 120 kmph E) 180 kmph

Rationale: "time = 12 distence = 540 3 / 4 of 12 hours = 12 * 3 / 4 = 9 hours required speed = 540 / 9 = 60 kmph b )"
Answer: B