//Circular ring
//refer fig. 21.9 (a) and (b)
//Radius of gyration about centre of the ring
//Kz^2=(((R1^2)+(R2^2))/(2))+R2^2
//thus
Kz=sqrt(((1+0.75*0.75)/(2))+(0.75^2))
T=2*%pi*sqrt(1.34375/(9.81*0.75))  //sec
printf("\nT=%.3f sec",T)