Ben drinks tea at an incredible rate. he drinks 3 1/2 liters of tea every 2/3 of an hour. how many liters of tea does he drink in one hour

Ben drinks 3 1/2 liters of tea every 40 minutes.

This means that he would drink 1 3/4 of tea every 20 minutes (divide both sides by 2).

Now, let's multiply each side by 3. 

1.75 * 3 = 5.25 (aka 5 1/4)

20 * 3 = 60 minutes (an hour)

He drinks 5 1/4 liters of tea in one hour.