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A man uses a concave mirror for shaving....

A man uses a concave mirror for shaving. He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged. Find the focal lengt.1 of the mirror

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A man uses a concave mirror for shaving. He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged. Find the focal length of the mirror

A man uses a concave mirror for shaving. He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged. Find the focal length of the mirror

A man uses a concave mirror for shaving. He keeps his face at a distance of 20cm form the mirror and gets an image which is 1.5 times entarged. Find the focal length of the mirror.

A man uses a concave mirror for shaving. He keeps his face at a distance of 20cm form the mirror and gets an image which is 1.5 times entarged. Find the focal length of the mirror.

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An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is