Question

Jada walks up to a tank of water that can hold up to 10 gallons. When it is active, a drain empties

water from the tank at a constant rate. When Jada first sees the tank, it contains 7 gallons of water.
Three minutes later, the tank contains 5 gallons of water.
Type your answers in the boxes below.
C. How many minutes before Jada arrived was the water tank completely full?

Answer 1

3 minutes and 30 seconds

Explanation:

7-5 = 2

3/2 = 1.5 gallons that empty per each minute

1.5 times 3 (minutes) = 4.5 gallons emptied

Remaining gallons to empty = 0.5

0.5 gallons to empty will take 30 seconds

I hope this helps :)