laura has a job interview its is 20 miles away

Question

Laura has a Job interview that is 20 miles away. However, due to construction, she will have to take a detour of about 15 miles. If she drives at an average of 60 miles per hour and wants to arrive 15 minutes early, how much time should Laura allow for the trip

Answer 1

35 mi / 60 mph = 7/12 hour

7/12 hour = 35 min

She should leave 50 minutes before the appointment time.