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) 16 min
B) 26 min
C) 34 min
D) 20 min
E) 12 min
Speed Ratio = 1:4/5 = 5:4Time Ratio   = 4:51 -------- 5 4 --------- ? è 20   Answer: 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?