SOLUTION: If your car now gets 9.00 km/L of gasoline, and if you can go 400 km on a tank of gasoline, how far could you drive with the same amount of gasoline in a car that gets 15.0 km/L

Algebra ->  Finance -> SOLUTION: If your car now gets 9.00 km/L of gasoline, and if you can go 400 km on a tank of gasoline, how far could you drive with the same amount of gasoline in a car that gets 15.0 km/L      Log On


   

Question 1171039: If your car now gets 9.00 km/L of gasoline, and if you can go 400 km on a tank of gasoline,
how far could you drive with the same amount of gasoline in a car that gets 15.0 km/L
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
This can be done using two SIMPLE PROPORTIONS using units for KILOMETERS%2FLITERS


9%28km%2FL%29=%28400%2Fv%29%28km%2FL%29--------------solve for this v.


Now, different car, but the same v of gasoline. How far?
This car goes at 15 km/L.

15%28km%2FL%29=%28d%2Fv%29%28km%2FL%29----------You would have already found the needed v; now you solve the new equation for d.

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Note that I said, "two simple proportions" can be a way to solve. These can be more like:
9%2F1=400%2Fv
and then
15%2F1=d%2Fv
.