2025 · Q46
Travelling at 3/5^(th) of his usual speed, a man is late by 20 minutes. What is the usual time if he travels with his usual speed ?
Elementary MathematicsTime, Speed and Distance
- A25 minutes
- B30 minutes
- C32 minutes
- D35 minutes
Explanation
With usual speed u and time t, ut = (3u/5)(t + 20). Hence 5t = 3t + 60, giving t = 30 minutes, option (b).