Maximum mass that the scale can read, \\\\(M=50kg\\\\)Maximum displacement of the spring = Length of the scale, \\\\(l=20cm = 0.2 m\\\\)Time period, \\\\(T=0.6s\\\\)Maximum force exerted on the spring, \\\\(F=Mg\\\\)where,\\\\(g=\\\\) acceleration due to gravity \\\\(=9.8\\,m/s^2\\\\)\\\\(F=50\ imes 9.8=490\\\\)\\\\(\ herefore\\\\) Spring constant, \\\\(k=F/l=490/0.2=2450\\,Nm^{-1}\\\\)Mass m, is suspended from the balance.Times period, \\\\(t=2\\pi\\sqrt{\\dfrac{m}{k}}\\\\)\\\\(\ herefore m=\\left(\\dfrac{T}{2\\pi}\\right)^2\ imes k=\\left(\\dfrac{0.6}{2\ imes 3.14}\\right)^2\ imes 2450=22.36kg\\\\)\\\\(\ herefore\\\\) Weight of the body \\\\(=mg=22.36\ imes 9.8=219.16\\,N\\\\)Hence, the weight of the body is about 219 N.