[" 1) "90quad " 2) "90times sqrt(8)" is revolving around the "],[" sun in a circular orbit of radius "r" with time "],[" period "T" ,then mass of the sun is "],[[" 1) "4 pi^(2)r^(3)/GT," 2) "4 pi^(2)r^(3)/GT^(2)],[" 3) "4 pi^(2)r/GT," 4) "4 pi^(2)r^(3)/G^(2)T^(2)]]