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P and Q are 27 km away. Two trains with speed of 24 km/hr and 18 km/hr respectively start simultaneously from P and Q and travel in the same direction. They meet at a point R beyond Q. Distance QR is :

A. 126 km

B. 81 km

C. 48 km

D. 36 km

Answer: Option B

Solution(By Examveda Team)

Relative speed = 24 - 18 = 6 km/hr
Time required by faster train to overtake slower train :
= $$\frac{27}{6}$$
= $$4\frac{1}{2}$$ hr
∴ Distance between Q and R :
= 18 × $$4\frac{1}{2}$$
= 81 km

This Question Belongs to Arithmetic Ability >> Speed Time And Distance

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