A jeep takes 8 hours to cover a distance of 280 Km. how much should the speed in Kmph be maintained to cover the same direction in 3/2th of the previous time? Choose the correct choice:
A) 28 kmph
B) 52 kmph
C) 20 kmph
D) 23 kmph
E) 65 kmph

Rationale: "time = 8 distance = 280 3 / 2 of 8 hours = 8 * 3 / 2 = 12 hours required speed = 280 / 12 = 23 kmph d )"
Answer: D