Maria is taking a math test that has 4 parts. She has a total of 3/4 of an hour to complete all the parts. If she is allowed the same amount of time to complete each part, how much time does she have to spend on each part?

Maria has to spend 3/4 / 4 = <<3/4/4=3/16>>3/16 of an hour to spend on each part.

She has to spend 3/16 x 60 minutes = <<3/16*60=11.25>>11.25 minutes to spend on each part. Answer: \boxed{11.25}.