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Manufacturers need to minimise the amount of material used to make their product. What is the best cross-section for a gutter?

The Fastest Cyclist

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

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?