Q163
ArithmeticSpeed, Time & Distance
Walking at $\frac{5}{4}$th of the usual speed, a person reaches his office 12 minutes too early. What is the usual time?
- a.48 minutes
- b.60 minutes
- c.70 minutes
- d.80 minutes
Answer: (B) 60 minutes
At $\frac{5}{4}$ of the speed the time is $\frac{4}{5}$ of the usual time, a saving of $\frac{1}{5}$ of it. So $\frac{1}{5}$ of the usual time = 12 minutes, and the usual time is 60 minutes. 48 minutes is the time at the faster speed.