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## Homework Statement

Einstein's theory of general relativity is relativistic model of gravity. "Relativistic" means it involves the speed of light, c; "gravity" means it involves Newton's constant, G. Use dimensional analysis to derive a formula for the surface area, A, of a black hole of mass M, up to a dimensionless proportionality constant.

## Homework Equations

N/A

## The Attempt at a Solution

I have little idea of how to tackle this question. Any sort of help would be appreciable.