Question

A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of the mirror such that its image is formed 10 cm in front of the mirror
what is the focal length
position of object
magnification of object
height of object
Please help!!
I am truly stuck

Answer 1

Have you drawn a ray diagram?
then, used the mirror equation?

Answer 2

When an object is placed at a distance of 15cm from a concave mirror its image is formed at a 10 cm in front of the mirror. Find the focal length