A saltwater solution is made by dissolving 7 pounds of salt in 10 gallons of water. At this rate, how many pounds of salt are needed for 40 gallons of water?
A) 28 pounds
B) 25 pounds
C) 280 pounds
D) 30 pounds
E) none of these

Question

Quizplus · Accepted Answer

The solution uses a simple ratio: 7 pounds of salt for every 10 gallons of water. For 40 gallons, which is 4 times 10 gallons, you need 4 times 7 pounds of salt, which equals 28 pounds.

A Saltwater Solution Is Made by Dissolving 7 Pounds of Salt