Solve the Equation $$\sqrt { 90 - 2 r } = \sqrt { 8 r + 10 }$$

Solve the equation. $$\sqrt { 90 - 2 r } = \sqrt { 8 r + 10 }$$

A) r = 81
B) r = 8
C) r = 64
D) r = 9
E) no solution