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+//Compound pendulum
+//refer fig. 21.8
+//Length of uniform rod
+l=0.6  //m
+//Radius of uniform disc
+r=0.3  //m
+//Mass moment of inertia about centre of suspention
+Iz=((25*0.6^2)/(9.81*12))+((25*0.6^2)/(9.81*2*2))+((40*0.15^2)/(2*9.81))+((40*(0.6+0.15)^2)/(9.81))  //units
+M=((25)/(9.81))+((40)/(9.81))
+//Kzz^2=0.3992
+//Distance of centre of gravity of compound pendulum from centre of suspension
+r=(25*0.3+40*0.75)/(25+40)  //m
+T=2*%pi*sqrt((0.3992)/(0.5769))  //sec
+//equivalent length
+Le=(0.3992/0.5769)  //m
+printf("\T=%.3f sec\nLe=%.3f m",T,Le)