Question 792203
Three people can complete a task in 3hr. 20min. How long would it take 4 people to complete the same task if they worked at the same rate as the other 3? 
---------
Note: 3hr 20 min = 3 1/3 = 10/3 hours.
------------------------
# of people and amt. of time are inversely related:
t = k/p
-------
Solve for "k" using "three people can complete a task in 3hr. 20 min".
-------
10/3 = k/3
k =10
----------
Equation:
t = 10/p
------
How long would it take 4 people to complete the same task if they worked at the same rate as the other 3?
t = 10/4
t = 5/2 = 2 1/2 hrs or 2hrs 30min
==================
Cheers,
Stan H.
==================