A plane mirror is placed 22 5 cm in front of a concave

Last updated: 5/29/2023

A plane mirror is placed 22 5 cm in front of a concave mirror An object is placed between the two mirrors at 7 5cm from plane mirror so that the first image in both the mirrors coincides The focal length of mirror a 20 cm b 15 cm c 10 cm d 5 cm