Question

A concrete mix calls for 3 buckets of sand for every gallon of water. How much water is needed for 1 bucket of sand?

Answer 1

Explanation:

Write a proportion:

3 buckets / 1 gallon = 1 bucket / x gallons

Cross multiply and solve:

3x = 1

x = 1/3

You need 1/3 of a gallon of water.