1990 AJHSME Problems/Problem 13

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Problem

One proposal for new postage rates for a letter was $30$ cents for the first ounce and $22$ cents for each additional ounce (or fraction of an ounce). The postage for a letter weighing $4.5$ ounces was

$\text{(A)}\ \text{96 cents} \qquad \text{(B)}\ \text{1.07 dollars} \qquad \text{(C)}\ \text{1.18 dollars} \qquad \text{(D)}\ ...$

Solution

After the first ounce, there are $3.5$ ounces left. Thus, it is required to pay for $3$ ounces and then the extra half.

The total price is $30+4\times 22=118$ cents, which is choice $\boxed{\text{C}}$ .

1990 AJHSME (Problems • Resources)
Preceded by Problem 12	Followed by Problem 14
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1990 AJHSME Problems/Problem 13

From AoPSWiki

Problem

Solution

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