If 8 men now 4 identical greens in 20 minutes, how many are needed to now a similar sized bowling greens in 1 hour?

Answer 1

so

1 man mows 4 greens in 160 min

1 man moves one green in 40 min

You did not say how many greens to mow in an hour so I can not continue, but you should be able to figure it out now that you have the data for one man