- Thread starter max
- Start date

- Joined
- Jun 18, 2007

- Messages
- 18,134

SoIf x people working at the same rate can complete a job in h hours, what part of the same job can one person working alone complete in k hours?

1 person - in h hours - can complete 1/x part of the job

1 person - in 1 hours - can complete 1/(xh) part of the job

Now finish it....

I don't understand the 1/x part. How u do that?

I get the 1 over h part. It would be the same if I said Jack can paint a room in 3 hours that would mean he could paint 1/3 of the room in 1 hour.

I don't get the first part 1/x. What does that mean?

thanks a bunch!

If 3 friends can makeover and paint the garage in 3 hours, how long would it take just one of them to do it if the others changed their minds about doing it?

So if 3 can do it in 3 hours

1 can do 1/3 of it in 3 hours

and can do 1/3*3, or 1/9 of it in 1hour

So he can do the whole job in 9 hours.

Is that right?

- Joined
- Jun 18, 2007

- Messages
- 18,134

If two (3) people can finish a job - how much each(1) do = 1/3

If two (4) people can finish a job - how much each(1) do = 1/4

If two (x) people can finish a job - how much each(1) do = 1/x

- Joined
- Jun 18, 2007

- Messages
- 18,134

So if 3 can do it in 3 hours

1 can do 1/3 of it in 3 hours

and can do 1/3*3, or 1/9 of it in 1hour

So he can do the whole job in 9 hours.

Is that right?... CORRECT