The sound of a cannon firing is heard one second later at a position $B$ that at position $A$. If the speed of sound is uniform, then
The sound of a cannon firing is heard one second later at a position $B$ that at position $A$. If the speed of sound is uniform, then
- [KVPY 2017]
- A
the positions $A$ and $B$ are foci of a hyperbola, with cannon's position on one branch of the hyperbola
- B
the position $A$ and $B$ are foci of an ellipse with cannon's position on the ellipse
- C
one of the positions $A, B$ is focus of a parabola with cannon's position on the parabola
- D
it is not possible to describe the positions of $A, B$ and the cannon with the given in formation
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