Question

A real image formed by a concave mirror is 4.5 times the size of the object. If the mirror
is 20 cm from the object, its focal length is
1) 90/11 cm 2) 120/11 cm
3) 150/11 cm 4) 180/11 cm​

Answer 1

Step-by-step explanation:

180/11 is the answer for your question