Jim decides he wants to practice for a marathon coming up. He starts off by running 5 miles every day for 30 days straight. He then pushes himself to run 10 miles a day for the next 30 days. Finally, as marathon day gets closer Jim runs 20 miles a day for 30 days straight. How many miles does Jim run in total during the 90 days?
Thoughts? Step-by-step reasoning:
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Jim runs 5 miles a day for 30 days for a total of 5 * 30 = 150 miles. The next month Jim runs 10 miles a day for 10 * 30 = 300 miles. The last month Jim runs 20 miles a day for 20 * 30 = 600 a month. All together, Jim runs 150 + 300 + 600 = 1050 miles in three months.
Thus, the answer is 1050.
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