Borrowing bicycle

Jakub lent a bicycle to friends who wanted to ride it. For a three-hour bike ride, Jakub received 2 chocolates. Yup. If you wanted a bike for 2 hours, you had to give Jakub 12 candies. Peter gave Jakub 1 chocolate and 3 candies. How long can Peter ride Jakub's bicycle?

Result

t = 2:00 h

Step-by-step explanation:

$$\begin{gathered} c_1=3\mathrm{/}2={\displaystyle \frac{3}{2}}=1.5 \\ {c}_2=2\mathrm{/}12={\displaystyle \frac{1}{6}}\doteq 0.1667 \\ t=1\cdot c_1+3\cdot c_2=1\cdot 1.5+3\cdot 0.1667=2=2:00\text{ h} \end{gathered}$$

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