Question

During the shooting of a superhit film 'MARD' Amitabh Bachchan was waiting for his beloved Amrita Singh with his dog. When he saw her approaching, the dog was excited and dashed into her then went back to master and so on, never stopping. How far would you estimate the dog ran, if its speed is $30km/h$ and each of them walked at $4km/h$, starting $400m$ apart?

• A. $400m$
• B. $880m$
• C. $1500m$
• D. $30km$

Answer 1

The correct option is C $1500m$

$V_{AB.AS}=8km/h$

$S_{relative}=400$

Time to meet=$\frac{400\times {10}^{-3}}{8}=0.05hr$

$S_{dog}=30\times 0.05=1.5km=1500m$