Answers

2014-04-24T12:15:48+05:30
K/m=m/r
=> k*r= m^2            ...(i)

now,
 k/m=5/4
=> m = 4*k/5  = 4*6 /5

In (i),

r = m^2 / k
r  = (4*6/5)^2 /6
2 5 2