Radius of gyration of a body about an axis is 12 cm. Radius of gyration of the same body about a parallel axis passing through its centre of gravity is 13 cm. T?hen perpendicular distance between the two axes is

Options

A. 5 cm
B. 1 cm
C. 15 cm
D. 10 cm

Answer

A

Explanation

`K_(0)^(2)=K_(c )^(2)+h^(2)`
`therefore h^(2)= K_(0)^(2)-K_(c )^(2)`
`= 13^(2)-12^(2)=169-144`
`h^(2)=25`
`h=5 cm`.