8 m = ________________
The focal length of the convex mirror is 20 cm, its radius of curvature will be:
The radius of curvature for a convex lens is 40 cm, for each surface. Its refractive index is 1.5. The focal length will be
[MP PMT 1989]
A girl has four squares of side 8cm. What will be the perimeter of the largest rectangle that can be formed using these four small squares?