Q. Two cars $A$ and $B$ are moving with same speed of $45\ km/hr$ along same direction. If a third car $C$ coming from the opposite direction with a speed of $36\ km/hr$ meets two cars in an interval of 5 minutes, the distance of separation of two cars $A$ and $B$ should be (in $km)$

A) $6.75$
B) $7.25$
C) $5.55$
D) $8.35$
Explanation

(a) Distance $b/w$ the cars $A$ and $B$ remains constant. Let the distance be ‘$x$’
Velocity of $C$ w.r.t. $A$ and $B$ $V = 45 + 36 = 81\ km/h$
Distance $= 81 \times \frac{5}{60} = 6.75\ Km$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.