Walking with 4/5 of my usual speed, I miss the bus by 5 minutes. What is my usual time?	Choose the correct choice from the following answers: A) 35 min B) 30 min C) 25 min D) 20 min E) 40 min
Explanation:   Speed Ratio = 1:4/5 = 5:4Time Ratio = 4:51 -------- 5 4 --------- ? è 20   ANSWER IS 20 min
<result>D</result>
Walking with 4/5 of my usual speed, I miss the bus by 5 minutes. What is my usual time?