There are a total of 200 liters of oil in two barrels. If we transfer the same amount of
oil that barrel II contains from barrel I to barrel II, then, we transfer the same amount of
oil that barrel I contains from barrel II back to barrel I, the two barrels will end up having
the same amount of oil. Find the amount of oil in barrel I originally.
There are a total of 200 liters of oil in two barrels. If we transfer the same amount of oil that barrel II contains from barrel I to barrel II, then,
By Iris
We call the amount of the oll barrel Iand II : x and y
According to the information , we have :
x + y = 200 ( 1 )
After transfer :barrel l : 2y – x
barrel ll : 2x-y
2y-x = 2x-y
x = y
According to (1) and (2) , we have x = 100
y = 100
We call the amount of the oil barrel I and II: x and y
According to the information, we have:
x + y = 200 (1)
After transfer: barrel I: 2y-x
barrel II: 2x-y
→ 2y-x = 2x-y (2)
⇒ x=y
According to (1) and (2), we have x=100
y=100
Barrel I have 100 liters of oil originally