An Object Is Placed near a Concave Mirror Having a Radius

Multiple Choice

An object is placed near a concave mirror having a radius of curvature of magnitude $60 \mathrm {~cm}$ . How far should you place the object from the mirror so that the lateral magnification produced by the mirror will be $+ 2.5$ ?

A) $24 \mathrm {~cm}$
B) $18 \mathrm {~cm}$
C) $42 \mathrm {~cm}$
D) $30 \mathrm {~cm}$
E) $36 \mathrm {~cm}$