A convex lens has focal length 30cm- If an object is placed a distance of 15cm from it then the magnification produced by the lens is-6-660-512

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A convex lens has focal length $30$ cm. If an object is placed at a distance of $15$ cm from it then the magnification produced by the lens is?
$6.66$
$0.5$
$1$
$2$

1

0.5

6.66

2

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A convex lens has focal length 30cm. If an object is placed at a distance of 15cm from it then the magnification produced by the lens is?6.660.512

A convex lens has focal length $30$ cm. If an object is placed at a distance of $15$ cm from it then the magnification produced by the lens is?
$6.66$
$0.5$
$1$
$2$