Problema Solution
Fifteen liters of fuel containing 3.2% oil is available for a certain two-cycle engine. This fuel is to be used for another engine requiring a 5.5%. How much pure oil is required?
Answer provided by our tutors
let
x = 15 l of 3.2% oil
y = liters of pure oil
x + y liters is the 5.5% oil fuel we have to make
3.2% of x + 100% of y = 5.5% of (x + y)
0.032*15 + 1*y = 0.055*(15+y)
0.945*y = 0.345
y = 0.3651 l
We need 0.3651 liters of pure oil.