Number of days in water tank?

Question

Elephant water tank holds 2560 gallons of water. After two weeks, zookeeper measures and finds the tank with only 1,934 gallons of water left. If the elephant drinks the same amount each day, how many days will a full tank of water last?

Answer 1

So the elephant drinks (2560-1934)/14 = 44.71 gallons per day.

A full tank has 2560 gallons of water, so it can be consumed by (2560/44.71) = 57.25 days