Question

Wastewater is filling barrels at the rate of 7 quarts per hour. The recycling facility picks up 25 full barrels on each trip, and each barrel holds 48 quarts of wastewater. How many days are between each pickup?

Answer 1

First, we know that 7 quarts = 1 hour to fill up
So, 48 quarts would take about 6.85 hours to fill up because 48/7=6.85
1 barrel holds 48 quarts which means again, it takes 6.85 hours to fill just one barrel.
25 barrels of 48 quarts are picked up at a time.
25 * 6.85 hours = 171.25 hours in one trip.
There are 24 hours in a day, so take 171.25/24 = 7.13 days.