The focal length of convex lens is 30 cm and the size of image is quarter of the object, then the object distance is:-

Q. The image formed by convex mirror of focal length $30cm$ is a quarter of the size of the object. Then the distance of the object from the mirror is:

Q. Image of an object at infinity is formed by a convex lens of focal length $30cm$ such that the size of the image is $2cm$. If a concave lens of focal length $20cm$ is placed in between the convex lens and the image, at a distance $26cm$ from the convex lens, size of the new image is:

Q. The size of the image of an object, which is at $\infty ,$ is formed by a convex lens of focal length $30\text{cm}$ is $2\text{cm}.$ If a concave lens of focal length $20\text{cm}$ is placed between the convex lens and the image at a distance of $26\text{cm}$ from the convex lens. Find the new size of the image-

Q. An object is placed at a distance of $5$ cm from a convex lens of focal length $10$ cm, then the image

Q. The size of the image of an object, which is at infinity, as formed by a convex lens of focal length $30cm$ is $2cm$. If a concave lens of focal length $20cm$ is placed between the convex lens and the image at a distance of $26cm$ from the convex lens, calculate the new size of the images.