Fuel economy

How many kilometers is sufficient petrol in the cylinder fuel tank with a diameter of 40 cm and the base of tank length of 1 m when it is filled to 60%, and if the car consumes 15 liters per 100 km?

Correct answer:

x =  502.7 km

Step-by-step explanation:

$$\begin{gathered} D=40/10=4 \\ l=1\cdot 10=10 \\ r=D/2=4/2=2 \\ V=\pi \cdot r^2\cdot l=3.1416\cdot 2^2\cdot 10\doteq 125.6637 \\ {V}_2=60/100\cdot V=60/100\cdot 125.6637\doteq 75.3982 \\ x=V_2\cdot 100/15=75.3982\cdot 100/15=502.7\text{km} \end{gathered}$$

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