An experienced landscaper can landscape garden with an area of 60sq. m thrice as fast as an apprentice. Working together, it takes the landscapes 6 days. How long would it take the apprentice working alone?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance