Ferdinand

Ferdinand went from place A to place B and from there to place C. A is 7.2 km from B, and B is 11.7 km from C. Albert went from place A to place D and from there to place C. D is 9.1 km from A and C is 10.8 km from D. Who traveled more and by how much?

Correct answer:

x = A
d =  1 km

Step-by-step explanation:

$$\begin{gathered} AB=7.2\text{km} \\ BC=11.7\text{km} \\ F=AB+BC=7.2+11.7=\frac{189}{10}=18\frac{9}{10}=18.9\text{km} \\ AD=9.1\text{km} \\ DC=10.8\text{km} \\ A=AD+DC=9.1+10.8=\frac{199}{10}=19\frac{9}{10}=19.9\text{km} \\ A>F \\ x=A \end{gathered}$$

$d=|A-F|=|19.9-18.9|=1\text{km}$

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