Question

In 3 ​minutes, a conveyor belt moves 200 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 7 minutes. If both belts are​ used, find how long it takes to move the cans to the storage area. The conveyor belts can move the 200 pounds of recyclable aluminum from the delivery truck to a storage area in nothing minutes.

Answer 1

1.5 min

Explanation:

rate of larger belt = 300/2 = 150

rate of smaller belt = 300/6 = 50

combined rate = 150+50=200

time at combined rate = 300/200 = 1.5