Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time, his speed (in km/ hr) must be
(a)6
(b)8
(c)12
(d)15
Answer
Answer (as printed): C
Explanation
Remaining distance $=3\mathrm{km}$ and Remaining time $=\left(\frac{1}{3}\times45\right)\mathrm{min}=15\mathrm{min}=\frac{1}{4}\mathrm{hour}$. $$\therefore \text{Required speed} = (3\times4)\mathrm{km}/\mathrm{hr}=12\mathrm{km}/\mathrm{hr}.$$