Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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Problem G. 685. (November 2019)

G. 685. The fuel tank of an American car can hold 15 gallons of gasoline. How many miles can the driver of the car go with the car, which was initially filled fully with gasoline, if according to the European catalogue of the car the fuel consumption of the car is 6.5 litres per 100 kilometres?

(3 pont)

Deadline expired on December 10, 2019.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. Mivel 1 gallon kb. 3,78 liter, valamint 1 (angol) mérföld kb. 1,61 km, az autó fogyasztása:

$\displaystyle \frac{6{,}5~\text{liter}}{100~\rm km}=\frac{6{,}5\cdot \frac{1}{3{,}78}~\text{gallon}}{100\cdot \frac{1}{1{,}61}~\text{mérföld}}\approx 0{,}0277~\frac{\text{gallon}}{\text{mérföld}}.$

Ez annyit jelent, hogy 15 gallon benzinnel az autó $\displaystyle \frac{15}{0{,}0277}\approx 540$ mérföldet képes megtenni.

Statistics:

 100 students sent a solution. 3 points: 82 students. 2 points: 10 students. 1 point: 5 students. Not shown because of missing birth date or parental permission: 3 solutions.

Problems in Physics of KöMaL, November 2019