SOLUTION: When 6 students show up for the Swift River Cleanup Day, they can pick up all of the bottles and trash on their section of the riverfront in 2 1/2 hr. If 9 students show up, how lo

Question 203843: When 6 students show up for the Swift River Cleanup Day, they can pick up all of the bottles and trash on their section of the riverfront in 2 1/2 hr. If 9 students show up, how long will the same cleanup take?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
When 6 students show up for the Swift River Cleanup Day, they can pick up
all of the bottles and trash on their section of the riverfront in 2 1/2 hr.
If 9 students show up, how long will the same cleanup take?
:
Let t = time required using 9 students
;
You can solve this using man-hrs, given:
6 * 2.5 = 15 man-hrs required to do the job
Then
9t = 15
t =
t = 1 hrs if 9 students work
:

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