Q6. A moon orbits a planet with a period of 10 days and radius \( 7 \times 10^8 \, \text{m} \). What is the planet’s mass? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2, 1 \, \text{day} = 86400 \, \text{s} \))
- A. 2.6 × 10²⁵ kg
- B. 2.7 × 10²⁵ kg
- C. 2.8 × 10²⁵ kg
- D. 2.9 × 10²⁵ kg