Beer Run

A man runs n laps around a circular track with a radius of t miles. He says he will drink s quarts of beer for every mile he runs. How many quarts will he drink? Click below for the answer.

He will only need one quart, no matter how far he runs. If the radius of the track is t miles, then the circumference is 2*pi*t miles. The man will run n laps, so the total distance is 2*pi*n*t miles. If he drinks s quarts per mile, then the total amount of beer is 2*pi*n*t*s, which equals one quart!