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A transparent rod 30.0cm long is cut flat at one end and rounded to a hemispherical...

A transparent rod 30.0cm long is cut flat at one end and rounded to a hemispherical surface of radius 10.0cm at the other end. A small object is embedded within the rod along its axis and halfway between its ends, 15.0cm from the flat end and 15.0cm from the vertex of the curved end. When the rod is viewed from its flat end, the apparent depth of the object is 8.20cm from the flat end.

What is its apparent depth when the rod is viewed from its curved end?

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