2016 · Q41
Walking at 3/4th of his usual speed, a man reaches his office 20 minutes late. What is the time taken by him to reach the office at his usual speed?
General Mental Ability, Quantitative Aptitude and StatisticsTime, work and measurement
- A80 minutes
- B70 minutes
- C60 minutes
- D50 minutes
Explanation
Speed and time are inversely proportional: at 3/4 of the usual speed the trip takes 4/3 of the usual time. The extra 1/3 equals the 20-minute delay, so the usual time is 20 × 3 = 60 minutes. Hence (C).