10% of a water tank fills every 5 minutes. If you are filling a 40 gallon tank, how many gallons will there be in 30 minutes?

Answer 1

10% of 40 gallons in 5 min
---> 4 gallons in 5 min
= 4/5 gallon in 1 minute,
so in 60 minutes .........

Answer 2

.1 * 30/5 = .6 of a 40 gallon tank = ?