If for a spherical mirror object dis†an ce is u, image dis†an ce is v and focal length is f then correct relation for magnification m is

Q. A spherical mirror forms an image of magnification $3$ for a real object. If the focal length of the mirror is $24\text{cm}$, then the object distance may be

Q. A spherical mirror forms an image of magnification $3$. The object distance, if focal length of mirror is $24cm$, may be

Q. If for a spherical mirror object distance, $u=(50.1\pm 0.5)cm$ and image distance $v=(20.1\pm 0.2)cm$, then focal length of the spherical mirror will be