SOLUTION: If a sheep and cow and eat a pile of grass in 30 days
and the same sheep and goat can eat the same pile of grass in 45 days
and the same cow and goat can eat the same pile of gra
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-> SOLUTION: If a sheep and cow and eat a pile of grass in 30 days
and the same sheep and goat can eat the same pile of grass in 45 days
and the same cow and goat can eat the same pile of gra
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Question 796982: If a sheep and cow and eat a pile of grass in 30 days
and the same sheep and goat can eat the same pile of grass in 45 days
and the same cow and goat can eat the same pile of grass in 60 days
So how many days will it take the sheep, cow and goat to finnish same pile of grass?? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Express their rates of eating as:
( 1 pile of grass ) / ( time to eat the pile in days )
-----------------------------------
Let = sheep's rate of eating grass
Let = cow's rate of eating grass
Let = goat's rate of eating grass
-----------------------------------
(1)
(2)
(3)
----------------------
Subtract (3) from (2)
(2)
(3)
Add this equation to (1)
(1)
---------------------
and
(1)
(1)
(1)
(1)
and
(3)
(3)
(3)
------------------
The sheep, cow and goat will take 2.71 days to finish the pile of grass
You can check the math- my method should be OK
