What is the mileage between Braselton GA and Marietta GA?

52 miles taking this route:

1. Take I-85 SOUTH (towards ATLANTA), from Braselton, to I-75 NORTH to CHATTANOOGA, via I-285 WEST ATLANTA BYPASS (EXIT 95B off I-85 to get onto I-285 WEST BYPASS ; EXIT 20 off I-285 to get onto I-75 NORTH to CHATTANOOGA).
2. Take I-75 NORTH to Marietta.