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?

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.