A compound microscope has an objective lens of focal length 10.3 mm with an eyep

Question

A compound microscope has an objective lens of focal length 10.3 mm with an eyepiece of focal length 15.0 mm, and it produces its final image at infinity. The object to be viewed is placed 2.00 mm beyond the focal point of the objective lens.

How far from the objective lens is the first image formed in mm?

What is the overall magnification of this microscope?

I've got 63.3 mm for the distance of the fist image formed. Having trouble understanding overall magnification. I got 102.43 X but it says it wrong.

Explanation / Answer

M = 85.77

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