Question
The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of Mercury. The Martian year is 687 Earth days. Then which of the following is the length of 1 year on Mercury?
NEET
Physics
Gravitation
2025
NEET 2025
NEET Physics Question (2025) — Solution
Options
- A. 88 earth days
- B. 225 earth days
- C. 172 earth days
- D. 124 earth days
Answer
A. 88 earth days
Step-by-step solution
aligned & T _ Mercury T _ Martian = ( r _ Mercury r _ Martian )^ 3 / 2 = ( 1 4 )^ 3 / 2 = 1 8 \\ & ~T _ Mercury = T _ Martian 8 = 687 8 =85.875 days 88 days aligned
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