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What's the largest volume of box you can make from a square of paper?

The Fastest Cyclist

Age 14 to 16
Challenge Level

What is the maximum calorie intake available to Andy, based on the snacks and energy drinks he can carry?

If he cycled for $7\frac{1}{2}$ hours, how many calories would he need? How many calories could he take in?

What if he cycled for $8$ hours?