1 year has around 52.1429 weeks We are given that one American consumes around 20 gallons of ice cream in a year. This means that the consumption is 20 gallons in 52.1429 weeks. Now, first we will calculate the amount consumed by 1 American in one week using cross multiplication as follows: consumption per week = (1*20) / (52.1429) = 0.38356 gallons
Now, to know the consumption of 50 Americans in one week, we will simply multiply the consumption of one American by 50 as follows: consumption of 50 Americans = 0.38356 * 50 = 19.18 gallons/week