Which Cole contains more caffeine?

Question

A 500-mL bottle of Coke Zero contains 48mg of caffeine. A 500-mL bottle of Diet Coke contains 65 Mg of caffeine. Which contains more caffeine: a 12-oz can of Diet Coke, or a 20-oz bottle of Coke Zero

Answer 1

Concentration of caffeine in Coke Zero: 48/500 = 0.096 mg/mL

Concentration of caffeine in Diet Coke: 65/500 = 0.130 mg/mL

Per Google, there are 29.5735 mL in 1 oz

So 12 oz of Diet Coke is 354.882 mL meaning the amount of caffeine in 12 oz would be (354.882 mL)(0.130 mg/mL) = 46 mg

And so 20 oz of Coke Zero is 591.47 mL meaning the amount of caffeine in 20 oz would be (591.47 mL)(0.096 mg/mL) = 57 mg Coke Zero wins