By walking at 3/4th of his usual speed, a man reaches office 5 minutes later than usual. What is his usual time?  Choices:
A) 15min B) 50min C) 65min D) 60min E) 70min
let T be the usual time.   time spent=4T/3   therefore, 4T/3=T+5   4T=3T+15...therefor T=15min   15minNSWER:15min
<result>A</result>
By walking at 3/4th of his usual speed, a man reaches office 5 minutes later than usual. What is his usual time?