JEE Mains 1-Feb-2023 Shift 1 Solved Paper

A thin cylindrical rod of length 10‌cm is placed horizontally on the principle axis of a concave mirror of focal length 20‌cm. The rod is placed in a such a way that mid point of the rod is at 40‌cm from the pole of mirror. The length of the image formed by the mirror will be ‌

x

3

‌cm. The value of x is _______.