1998 AMC 8 Problem 8

Below is the professionally curated solution for Problem 8 of the 1998 AMC 8, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1998 AMC 8 solutions, or check the answer key.

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Concepts:rate

Difficulty rating: 730

A child's wading pool contains $200$ gallons of water. If water evaporates at the rate of $0.5$ gallons per day and no other water is added or removed, how many gallons of water will be in the pool after $30$ days?

$140$

$170$

$185$

$198.5$

$199.85$

Solution:

The amount lost is $0.5\cdot 30=15$ gallons. Therefore, the amount left is $200-15=185.$

Thus, the correct answer is C .

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