Question

The planet A Thousand days to revolve around the sun if the radius of the planet become one fourth of the original radius find the time taken to revolve around the sun

Answer 1

let radius be r
speed be v
time taken = 2πr/v

let other radius be 1/4r
speed will be v
time taken = 1/2πr/v
time taken would be 1/4 of original planet