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 :

53/2 years 52/3 years 51/3 years 51/2 years

53/2 years

According to Kepler’s law T ∝ R3/2  \(T_{planet} = 5^{3/2} T_{earth}\)    = \(5^{3/2} * 1 \text{ year}\)    = 53/2 years