A screen is placed \( 90 \mathrm{~cm} \) from an object. The image ...

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A screen is placed \( 90 \mathrm{~cm} \) from an object. The image of an obiect on the screen is formed bv a convex lens at two different locations separated by \( 20 \mathrm{~cm} \)
P In the above problem, if the sizes of the images formed on the screen are \( 6 \mathrm{~cm} \) and \( 3 \mathrm{~cm} \), then the height of the object is nearly:
(B) \( 4.5 \mathrm{~cm} \)
(C) \( 5 \mathrm{~cm} \)
(D) \( 9 \mathrm{~cm} \)
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