When an object is kept at a distance of 30cm from a concave mirror

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When an object is kept at a distance of 30cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9cm s^(-1) the speed with which the image moves at that instant is
18
Sep
When an object is kept at a distance of 30cm from a concave mirror, the image is formed at a distance of 10 cm. If the object is moved with a speed of 9cm s^(-1) the speed with which the image moves at that instant is the image is formed at a distance of 10 [...]
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