Two satellites $S_{1}$ and $S_{2}$ are revolving around a planet in the opposite sense in coplanar circular concentric orbits. At time $t=0$, the satellites are farthest apart. The periods of revolution of $S_{1}$ and $S_{2}$ are $3 \,h$ and $24 \,h$, respectively. The radius of the orbit of $S_{1}$ is $3 \times 10^{4} \,km$. Then, the orbital speed of $S_{2}$ as observed from
Two satellites $S_{1}$ and $S_{2}$ are revolving around a planet in the opposite sense in coplanar circular concentric orbits. At time $t=0$, the satellites are farthest apart. The periods of revolution of $S_{1}$ and $S_{2}$ are $3 \,h$ and $24 \,h$, respectively. The radius of the orbit of $S_{1}$ is $3 \times 10^{4} \,km$. Then, the orbital speed of $S_{2}$ as observed from
- [KVPY 2017]
- A
the planet is $4 \pi \times 10^{4} \,km h ^{-1}$, when $S_{2}$ is closest from $S_{1}$
- B
the planet is $2 \pi \times 10^{4} \,km h ^{-1}$, when $S_{2}$ is farthest from $S_{1}$
- C
$S_{1}$ is $\pi \times 10^{4} \,km h ^{-1}$, when $S_{2}$ is closest from $S_{1}$
- D
$S_{1}$ is $3 \pi \times 10^{4} \,km h ^{-1}$, when $S_{2}$ is closest to $S_{1}$
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