Question

The distance of a planet from the sun is 5 times the distance between the earth and the sun. The Time period of the planet is

• A. $5 ^ { 3 / 2 }$ years
• B. $5 ^ { 2 / 3 }$ years
• C. $5 ^ { 1 / 3 }$ years
• D. $5 ^ { 1 / 2 }$ years

Answer 1

Answer: (A)

$5 ^ { 3 / 2 }$ years

Answer 2

According to Kepler’s law $T \propto R ^ { 3 / 2 }$

$\therefore$ $= 5 ^ { ( 3 / 2 ) } \times 1$ year $= 5 ^ { 3 / 2 }$ years.