A convex mirror has a radius of curvature of 60 cm. What will be the focal length of the mirror? 

• As the radius of curvature(R) of a convex mirror is on the right side, it will be considered positive which is  +60 cm.
• The relation between the focal length and the radius of curvature is given by : $\mathrm{f}= \frac{\mathrm{R}}{2}$
• The focal length of the mirror will be, $\text{f=}\frac{\text{R}}{2}\text{ =}\frac{+60}{2}\text{ =+30 cm}$

Hence +30 cm is the correct response.