SOLUTION: At a constant speed, the gasoline a car uses varies directly with the distance the car travels. A car uses 10 gallons of gasoline to travel 210 miles. How many gallons will the c

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Question 872068: At a constant speed, the gasoline a car uses varies directly with the
distance the car travels. A car uses 10 gallons of gasoline to travel
210 miles. How many gallons will the car use to travel 294 miles?

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39615)   (Show Source): You can put this solution on YOUR website!
This is a variation problem.

v for volume of fuel
d for distance
k is a constant

, "the gasoline a car uses varies directly with the
distance the car travels."
-


A car uses 10 gallons of gasoline to travel
210 miles. Meaning in symbols is gallons/mile.

The question: How many gallons will the car use to travel 294 miles?
The formula,

Answer by MathTherapy(10551)   (Show Source): You can put this solution on YOUR website!

At a constant speed, the gasoline a car uses varies directly with the
distance the car travels. A car uses 10 gallons of gasoline to travel
210 miles. How many gallons will the car use to travel 294 miles?

Let amount of gallons of gas be G
Then:
------ Simplifying right-side of equation by dividing it by
5G = 70 ------ Cross-multiplying
G or amount of gas = , or gallons
You can do a check!!
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