If I walk at 5 km/h, I miss the bus by 12 minutes. If I walk at 6 km/h, I reach 15 minutes before the arrival of the bus. How far I walk to reach the bus stand ?  Choose the correct answer: A) 11.0 km B) 13.8 km C) 11.5 km D) 12.5 km E) 13.5 km

Rationale: "d = product of speed difference of time / difference of speed d = 5 x 6 / 60 [ 12 â ˆ ’ ( â ˆ ’ 15 ) / 6 - 5 ] [ here , â € “ ve sign indicates before the schedule time ] â ‡ ’ d = 13.5 km answer e"
Answer: E