In India, it cost $1 to purify a gallon of fresh water. Each person needs 1/2 a gallon of fresh water a day. In a family of 6, how much will it cost for fresh water for the day?
Thoughts? Step-by-step reasoning:
The family needs 3 gallons of water because 6 x .5 = 3. It will cost $3 because 3 x 1 = 3.
Thus, the answer is 3.