Answer:
1.6 minutes = 1 minute and 36 seconds
Step-by-step explanation:
(Assuming that the correct values are 2 minutes, 600 pounds and 8 minutes)
The first belt can move 600 pounds of material in 2 minutes, so it can move 300 pounds per minute
The smaller belt can move the same 600 pounds the same distance in 8 minutes, so it can move 75 pounds per minute.
If we use them together, they can move 300+75 = 375 pounds of material per minute.
If we want to move 600 pounds of material, we can solve that using rule of three:
375 pounds -> 1 minute
600 pounds -> x minutes
375/600 = 1/x
x = 600/375 = 1.6 minutes = 1 minute and 36 seconds
