A chemist needs to create a 60% HCl solution. (HCl is hydrochloric acid. A "60% HCl solution" contains 60% HCl and the other 40% is water.)

How much of a 85% HCl solution must be mixed with 75 ml of a 30% HCl solution in order to result in a 60% HCl solution?

Round your answer to 2 places after the decimal point (if necessary) and do NOT type any units (such as "ml") in the answer box.