Two men P and Q start a journey from the same place at a speed of 3 km/hr and $$3\frac{1}{2}$$ km/hr respectively. If they move in the same direction then what is the distance them after 4 hours ?

A. 3 km

B. $$2\frac{1}{2}$$ km

C. 2 km

D. $$\frac{1}{2}$$ km

Answer: Option C

Solution(By Examveda Team)

Distance between the speed of P and Q
= $$3\frac{1}{2}$$ - 3
= $$\frac{7}{2}$$ - 3
= $$\frac{1}{2}$$ km/hr
So,
Distance = Speed × Time
. Time = 4 hours
⇒ Distance = $$\frac{1}{2}$$ × 4
⇒ Distance = 2 km