On the weekend, Tony will walk to the store. On weekdays, he runs to the store. When he walks, he goes 2 MPH. When he runs he goes 10 MPH. The store is 4 miles away. If he goes on Sunday, Tuesday, and Thursday, what is the average time in minutes that he spends to get to the store? Let's think first. Chain of thought:
On Sunday he takes 2 hours to get there because 4 / 2 = 2. This takes him 120 minutes because 2 x 60 = 120. On Tuesday and Thursday, it takes him .4 hours to get to the store because 4 / 10 = .4. On Tuesday and Thursday, it takes him 24 minutes to get to the store because .4 x 60 = 24. In total it takes him 168 minutes to get to the store because 120 + 24 + 24 = 168. On average it takes him 56 minutes because 168 / 3 = 56.
Therefore, the answer is 56.