SOLUTION: The amount of gasoline used by a car varies jointly as the distance traveled and the square root of the speed. Suppose a car used 25 liters on a 100 kilometer trip at 100 km/hr. Ab

Algebra ->  Test -> SOLUTION: The amount of gasoline used by a car varies jointly as the distance traveled and the square root of the speed. Suppose a car used 25 liters on a 100 kilometer trip at 100 km/hr. Ab      Log On


   

Question 990994: The amount of gasoline used by a car varies jointly as the distance traveled and the square root of the speed. Suppose a car used 25 liters on a 100 kilometer trip at 100 km/hr. About how many liters will it use on a 192 kilometer trip at 64 km/hr?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
g, amount of gasoline
d, distance traveled
v, speed
k, proportionality or variation constant

g=k%2Ad%2Av%5E2

If the changeable variables are known, then k=g%2F%28d%2Av%5E2%29.

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

The amount of gasoline used by a car varies jointly as the distance traveled and the square root of the speed. Suppose a car used 25 liters on a 100 kilometer trip at 100 km/hr. About how many liters will it use on a 192 kilometer trip at 64 km/hr?
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