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A bi-convex lens is formed with two thin...

A bi-convex lens is formed with two thin plano convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2. Both the curved surfaces are of the same radius of curvature R = 14 cm. For this bi-convex lens, for an object distance of 40 cm, the image distance will be

A

`- 280.0 cm`

B

`40.0 cm`

C

`21.5 cm`

D

`13.3 cm`

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