Question

A water delivery truck is filling the water tank at Morgan's house. The truck arrived with 2400 L of water. The number of liters, L, remaining in the truck at time t minutes decreases at a rate of 110 L/min. Write an equation to represent this situation and then find how long it takes for the truck to have 1100 L left.

Answer 1

`L = -110t + 2400, t =11.8 min`

Step-by-step explanation:

my brain is smart ¯\_(ツ)_/¯

Answer 2

11.81 minutes

Explanation:

Here is a simple step-by-step explaination of how to solve this word problem:

Since the truck has 2,400L in it to begin with, the first part of our equation will be 2,400L

`L = 2400L`

Next we know that the water in the truck decreases at a rate of 110L/min, or Liters per minute.

So we will put that in the equation:

`L = -110L + 2400L`

Now that we have our equation set up, its time to solve.

To figure out how much water it needs to lose in total to end up with 1100 L left, we subtract 1,100 from 2,400.

`2,400 - 1,100= 1,300`

Now we can take that number and divide it by how many liters per minute were lost.

`1,300/110=11.81`

So the total amount of time it took for the truck to have 1,100 L left is 11.81 minutes. Your answer would be

B.
`L=-110t + 2400, t=11.8` min

Hope this helps! : )