Problema Solution
The time it takes to fill a fish tank depends upon the rate at which the water is flowing. It takes 40 minutes to fill the fish tank at the rate of 3 gallons per minute. How many minutes will it take to fill the fish tank at the rate of 4 gallons per minute?
Answer provided by our tutors
using the fact that it takes 40 minutes to fill the fish tank at the rate of 3 gallons per minute we calculate the capacity of the tank:
40*3 = 120 gal
next we need to calculate how many minutes it takes to fill 120 gallons of fish tank at a rate of 4 gallons per minute:
120/4 = 30 min
it takes 30 min to fill the fish tank at the rate of 4 gallons per minute.