Question

A 12-ounce Pepsi contains 54 mg of caffeine. A can of Red Bull (8.2 oz) has 80 mg of caffeine.

How many ounces of Pepsi do you need to drink to get the same amount of caffeine that a Red Bull has? Round your answer to the nearest tenth, if needed.

Answer 1

`17.8\ ounces`

Explanation:

we know that

A 12-ounce Pepsi contains 54 mg of caffeine

A can of Red Bull (8.2 oz) has 80 mg of caffeine

so

using proportion

Find out how many ounces of Pepsi do you need to drink to get 80 mg of caffeine

Let

x ----> the number of ounces of Pepsi

`(12)/(54)(ounces)/(mg)=(x)/(80)(ounces)/(mg)\\\\x= 80*12/54\\\\x= 17.8\ ounces`