Three workers can load a truck in 8 minutes. how many workers need to join this team so that they can load that truck in 6 minutes?

1 extra worker

Step-by-step explanation:

If three workers load the truck in 8 minutes we have that:

3 workers = 8 minutes

We know that if we wanted to reduce the time at, for example, half, we would need to increase the workers in a half. More generally, if we want to reduce the time in 1/X me need to multiply the workers by X.

Here me need to reduce the time in 6/8 as 8*6/8 = 6. So, we will need:

3*8/6 = 24/6 = 4 workers.

So, we will need 1 more worker as we already have 3.

just sum

10 + 10 = 20