ACT SAT Prep Learn how to combine rates of two people to determine one individual rate

The video tutorial explains how to calculate the time it takes for two people, Joseph and Mitch, to install a driveway together at their individual rates. Joseph can complete a driveway in 9 hours, while Mitch takes 18 hours. By working together, they can complete a driveway in 6 hours. The tutorial uses an example of 36 hours to demonstrate how many driveways they can complete together, showing that Joseph can do 4 and Mitch can do 2, totaling 6 driveways. The conclusion is that together, they can complete one driveway in 6 hours.

How long does it take Joseph to install a driveway by himself?

• 18 hours

• 9 hours

• 6 hours

• 12 hours

If Mitch works alone, how many hours does he need to complete a driveway?

• 12 hours

• 18 hours

• 9 hours

• 6 hours

In the hypothetical scenario of 36 hours, how many driveways can Joseph complete?

• 4 driveways

• 3 driveways

• 2 driveways

• 5 driveways

How many driveways can Mitch complete in 36 hours?

• 4 driveways

• 3 driveways

• 2 driveways

• 1 driveway

How many hours would it take Joseph and Mitch to complete one driveway together?

• 7 hours

• 6 hours

• 4 hours

• 5 hours