Eric decides to go to the park. He runs for 20 minutes, then jogs for 10 minutes to reach the park. When he returns, he takes a different route home and this takes him 3 times as long as his trip there. How long does it take Eric to return home? Let's be accurate as possible.
Eric's trip to the park took 20 minutes running + 10 minutes jogging = 30 minutes. So his return trip took 30 minutes * 3 = 90 minutes.
The answer: 90.