Question:
A motorist travelled 122 kilometres before his first stop. If he had 10% of his journey to complete at this point, how long was the total ride?
Solution:
Let the length of total ride be $x \mathrm{~km}$.
Then, $10 \%$ of $x=122$
$\Rightarrow \frac{10}{100} x=122$
$\Rightarrow x=1220$
$\therefore$ The length of total ride is $1,220 \mathrm{~km}$.
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