Monika and Marcelos family owns two lawnmowers; a riding mower and a push mower. A person using the riding mower can completely mow the familys yard in 45 minutes. A person using the push mower can completely mow the yard in 105 minutes. If Monika uses the riding mower and Marcelo uses the push mower, how many minutes will it take to complete the job working together? Express your answer as a decimal to the nearest tenth.