In 3 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from the delivery truck to a storage area. A smaller belt moves the same quantity of cans the same distance in 9 minutes. If both belts are used, find how long it takes to move the cans to the storage area.
The conveyor belts together can move the 300 pounds of recyclable aluminum from the delivery truck to the storage area in minutes.
(Simplify your answer. Type an integer, fraction, or mixed number.)