Question

The distance of Venus from the sun is 0.72astronomic unit. Find the orbital period of Venus

Answer 1

By Kepler's 3rd law,
T^2 = R^3
T^2 = 0.72^3
T^2 = 0.37
T = 0.61

which is aproximately equal to 0.61 earth years, ie aprox equal to 222 days.