Problem Solving (PS) | Re: Pierres European car measures fuel economy in terms of liters per kil

Pierre’s European car measures fuel economy in terms of liters per kilometer. If the car averages (1 liter)/(10 kilometers) on a trip, what is the car’s approximate fuel economy in terms of the standard U.S. measurement of miles pergallon ? (Note: 1 gallon is approximately 3.78 liters, and 1 mile is approximately 1.61 kilometers.)


A. 4
B. 16
C. 24
D. 30
E. 40

Given economy\( = 10 kms/L\)

Conversions
\( 1 kms = \frac{1}{1.6} miles\)
\( 1 L = \frac{1}{3.78} gallon\)

Neweconomy
\( =10*\frac{1}{1.6}÷\frac{1}{3.78}\)

\( =10*\frac{3.78}{1.6}\)

\( =\frac{37.8}{1.6}\)

\( \approx{24}miles/gallon\)

Hence, optionC.

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