A neutral particle of mass 28 g is at rest in a uniform magnetic field $B=\frac{200}{3}T.$  At t=0, particle decays into two particle of equal mass and one of them having charge  $3\mu C$. Both of them move in separate paths lying in the plane perpendicular to magnetic field B. At later time t, the particle collides (neglecting the interaction force). Calculate $\frac{t}{100}$