Running 3/4th of his usual rate, a man is 10min late. Find his usual time in hours ?
Pick one.
A) 6/4 hrs  B) 3/4 hrs  C) 9/4 hrs  D) 3/4 hrs  E) 1/2 hrs
Explanation:   Walking at 3/4th of usual rate implies that time taken would be 4/3th of the usual time. In other words, the time taken is 1/3rd more than his usual time   so 1/3rd of the usual time = 15min   or usual time = 3 x 10 = 30min = 30/60 hrs = 1/2 hrs.   Answer: 1/2 hrs
<result>E</result>
Running 3/4th of his usual rate, a man is 10min late. Find his usual time in hours ?