Question

A large mixing tank currently contains 300 gallons of water, into which 8 pounds of sugar have been mixed. A tap will open,

pouring 20 gallons of water per minute into the tank at the same time sugar is poured into the tank at a rate of 2 pounds
per minute. Find the concentration (pounds per gallon) of sugar in the tank after 10 minutes.

Answer 1

We can use the formula:

concentration = (total sugar added in pounds) / (total water in gallons)

First, we need to find out how much sugar is added in 10 minutes. Since sugar is being added at a rate of 2 pounds per minute , in 10 minutes, we will have:

total sugar added = 2 pounds/minute * 10 minutes = 20 pounds

Next, we need to find out how much water is in the tank after 10 minutes. Since water is being added at a rate of 20 gallons per minute , in 10 minutes, we will have:

total water added = 20 gallons/minute * 10 minutes = 200 gallons

Therefore, the total amount of water in the tank after 10 minutes is:

total water = 300 gallons (initial water) + 200 gallons (water added) = 500 gallons

Finally, we can calculate the concentration of sugar in the tank by plugging in the values:

concentration = total sugar added / total water

concentration = 20 pounds / 500 gallons

concentration = 0.04 pounds/gallon

Therefore, after 10 minutes, the concentration of sugar in the tank is 0.04 pounds per gallon.

Answer 2

the concentration of sugar in the tank after 10 minutes is approximately 0.056 pounds per gallon.

Explanation:

Let's first calculate the amount of sugar that will be added to the tank during the 10 minutes:Amount of sugar added = rate of sugar * time = 2 pounds/minute * 10 minutes = 20 poundsThe initial amount of water in the tank is 300 gallons, and 20 gallons per minute are being added, so after 10 minutes, the amount of water in the tank will be:Amount of water in the tank = initial amount of water + rate of water * time = 300 gallons + 20 gallons/minute * 10 minutes = 500 gallonsTherefore, after 10 minutes, the total volume of the mixture in the tank will be 500 gallons, and the total amount of sugar in the tank will be 8 + 20 = 28 pounds.To find the concentration of sugar in the tank, we divide the total amount of sugar by the total volume of the mixture:Concentration of sugar = total amount of sugar / total volume of mixture = 28 pounds / 500 gallons ≈ 0.056 pounds per gallon