The magnifying power of an astronomical telescope is $8$ and the distance between the two lenses is $54 \, cm$. The focal lengths of the eye lens and the objective lens will be respectively:
- A$6 \, cm$ and $48 \, cm$
- B$48 \, cm$ and $6 \, cm$
- C$8 \, cm$ and $64 \, cm$
- D$64 \, cm$ and $8 \, cm$
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