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A car got 33 miles per gallon using gasoline that cost $2.95

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A car got 33 miles per gallon using gasoline that cost $2.95 [#permalink] New post 04 Jan 2017, 08:24
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A car got 33 miles per gallon using gasoline that cost $2.95 per gallon. Approximately what was the cost, in dollars, of the gasoline used in driving the car 350 miles?

(A) $10
(B) $20
(C) $30
(D) $40
(E) $50
[Reveal] Spoiler: OA

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Re: A car got 33 miles per gallon using gasoline that cost $2.95 [#permalink] New post 08 Jan 2017, 09:17
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Explanation

Scanning the answer choices indicates that you can do at least some estimation and still answer confidently.

The car used \(\frac{350}{33}\) gallons of gasoline, so the cost was \((\frac{350}{33}) \times 2.95 dollars\).

You can estimate the product \((\frac{350}{33}) \times 2.9\) by estimating \(\frac{350}{33}\) a little low, 10, and estimating 2.95 a little high, 3, to get approximately \(10 \times 3 = 30\) dollars.

You can also use the calculator to compute a more exact answer and then round the answer to the nearest 10 dollars, as suggested by the answer choices. The calculator yields the decimal \(31.287....\) . which rounds to 30 dollars.

Thus, the correct answer is Choice C, $30.
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Re: A car got 33 miles per gallon using gasoline that cost $2.95 [#permalink] New post 16 Jan 2017, 19:58
(E) $50
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Re: A car got 33 miles per gallon using gasoline that cost $2.95 [#permalink] New post 29 Apr 2018, 15:59
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Re: A car got 33 miles per gallon using gasoline that cost $2.95 [#permalink] New post 04 May 2018, 04:49
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As it asks for approximation, 3 $ drives 33 miles..
30 $ drives 330 miles which is the closest option.

Hence the answer
Re: A car got 33 miles per gallon using gasoline that cost $2.95   [#permalink] 04 May 2018, 04:49
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A car got 33 miles per gallon using gasoline that cost $2.95

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