Subject: General Aptitude · Chapter: Time and Distance · Exam: · Marks: · Difficulty:
Two men P and Q start a journey form same place at a speed of 3 km/hr and $3 \frac{1}{2} \mathrm{km} / \mathrm{hr}$ respectively. If they move in the same direction then what is the distance between them after 4 hours?
(a)3 km
(b)$2 \frac{1}{2} \mathrm{km}$
(c)2 km
(d)$\frac{1}{2} \mathrm{km}$
Answer
Answer (as printed): C
Explanation
Distance between the Speed of P and Q $$=3 \frac{1}{2}-3=\frac{7}{2}-3=\frac{1}{2} \mathrm{km} / \mathrm{hr} .$$ So, Distance = Speed × Time Time = 4 hours $$\Rightarrow D=\frac{1}{2} \times 4=2 \mathrm{km}$$