Question e064d3c7

Geometry and Trigonometry - Right triangles and trigonometry

In $△ A B C$ , $∠ B$ is a right angle and the length of $\bar{B C}$ is $136$ millimeters. If $\cos A = \frac{3}{5}$ , what is the length, in millimeters, of $\bar{A B}$ ?