Per NCERT Example 7.5, the period of Mars' orbit (orbit radius 1.52 × Earth's) is approximately which?
A1000 days
B684 days
C247 days
D365 days
Answer & Solution
Correct answer: B. 684 days
NCERT Ex 7.5(ii): T_M/T_E = (1.52)^(3/2) ⇒ T_M = 1.87 × 365 ≈ 684 days.
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