Answer:
sqrt(r^2/ Gt) =d
Explanation:
r^2/d^2 = Gt
Multiply each side by d^2
r^2/d^2 * d^2 = Gt * d^2
r^2 = Gt d^2
Divide each side by Gt
r^2/ Gt = Gt d^2 / Gt
r^2/ Gt = d^2
Take the square root of each side
sqrt(r^2/ Gt) = sqrt( d^2 )
sqrt(r^2/ Gt) =d