Walking with 4/5 of my usual speed, I miss the bus by 3 minutes. What is my usual time? Choices:
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 -------- 3 4 --------- ? è 12   Answer: 12 min
<result>E</result>
Walking with 4/5 of my usual speed, I miss the bus by 3 minutes. What is my usual time?