It takes • 2 park keepers 1 hour to weed 2 flowerbeds
• 3 park keepers 2 hours to prune 6 trees.
At 9 a. m. one morning, 5 park keepers start work as follows.
Number of park keepers Activity
2 Weed: 2 flowerbeds
3 Prune: 13 trees
When one activity has been completed all the park keepers work on the other activity.
You may assume that all the park keepers work at the same rate and are equally skilled.
How long does it take for the park keepers to complete the pruning and weeding?
You must show all your working.