Tony goes on 5 rollercoasters while he is at the park

Tony goes on 5 rollercoasters while he is at the park. The first went 50 miles per hour. The second went 62 miles per hour. The third when 73 miles per hour. The fourth when 70 miles per hour. His average speed during the day was 59 miles per hour. How fast was the fifth coaster?

GSM8K — Grade School Math 8K (Cobbe et al., OpenAI, 2021) · train #3323