A line graph represents the cost (in $\rupee$) of $n$ apples as $C = 10n$. From the graph, the cost of $12$…

A line graph represents the cost (in $\rupee$) of $n$ apples as $C = 10n$. From the graph, the cost of $12$ apples is:
  1. $\rupee\,100$
  2. $\rupee\,110$
  3. $\rupee\,120$
  4. $\rupee\,130$

Solution

$C = 10\times 12 = 120$.

Asked in: IMO

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