Question

the adequate intake (ai) for total water (including foods and beverages) for adult males is 3.7 liters (about 15 cups) per day. on average, fluids (i.e., beverages only) account for about 80% of total water intake. based on the ai for for total water, how many cups of fluids (i.e., beverages only) should adult males drink each day?
multiple choice
2.2 liters (about 9 cups) per day
2.7 liters (about 11 cups) per day
3.0 liters (about 13 cups) per day
3.7 liters (about 15 cups) per day

Explanation:

Step1: Calculate the amount of fluids

We know that fluids account for 80% of total water intake. The total water intake (AI) is 3.7 liters. To find the amount of fluids, we use the formula: \(Fluids = 0.8\times Total\ water\ intake\).
So, \(Fluids=0.8\times3.7 = 2.96\approx3.0\) liters.

Step2: Relate to cups

Since 3.7 liters is about 15 cups, we can also check the cup - based calculation. If 3.7 liters is 15 cups, then 1 liter is \(\frac{15}{3.7}\) cups. For 3.0 liters, the number of cups is \(3.0\times\frac{15}{3.7}\approx12.16\approx13\) cups.

Answer:

3.0 liters (about 13 cups) per day