Two waves are emitted from the same point and arrive at an observer 4.2 s apart

PHYSICS · Subjective · CBSE · Physics · Waves · Waves

Problem

Two waves are emitted from the same point and arrive at an observer 4.2 s apart. The waves have speeds

3.4 \text{ km s}^{-1}

and

8.0 \text{ km s}^{-1}

. How far away was the emission point?