SOLUTION: 9 men can unload 450kg of good in 2 hours. If after having unloaded 150kg of goods, 5 men were asked to do other jobs. How many more hours are needed for the remaining 4 men to unl

Algebra ->  Rate-of-work-word-problems -> SOLUTION: 9 men can unload 450kg of good in 2 hours. If after having unloaded 150kg of goods, 5 men were asked to do other jobs. How many more hours are needed for the remaining 4 men to unl      Log On


   

Question 1110375: 9 men can unload 450kg of good in 2 hours. If after having unloaded 150kg of goods, 5 men were asked to do other jobs. How many more hours are needed for the remaining 4 men to unload the rest of the goods?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
r, the rate for one man

------------------------------------------------
9 men can unload 450kg of good in 2 hours.
------------------------------------------------

9r%2A2=450
-
2r=50
highlight_green%28r=25%29, in kilograms per hour, the ONE-man rate.


------------------------------------------------------------------------
If after having unloaded 150kg of goods, 5 men were asked to do other jobs.
How many more hours are needed for the remaining 4 men to unload the rest of the goods?
------------------------------------------------------------------------

Assuming the one job is still to unload 450 kilograms of goods, and that 9 men unloaded 150 kg, the remaining 4 men still have 300 kg to unload.
x, how many more hours:

4%2A25%2Ax=300
-
x=300%2F%284%2A25%29
highlight%28x=3%29