A concave mirror of focal length \( 15 \mathrm{~cm} \) forms an image having twice the linear di...

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A concave mirror of focal length \( 15 \mathrm{~cm} \) forms an image having twice the linear dimensions of the object. The position of the object when the image is virtual will be
(A) \( 22.5 \mathrm{~cm} \)
(B) \( 30 \mathrm{~cm} \)
(C) \( 7.5 \mathrm{~cm} \)
(D) \( 45 \mathrm{~cm} \)
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