Difference between revisions of "2004 AMC 8 Problems/Problem 1"

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== Solution 2 ==
 
== Solution 2 ==
Since we know <math>12</math> centimeters on the map is equal to <math>72</math> kilometers, <math>1</math> centimeter on the map is simply <math>72/12</math>, which is <math>6</math>. The problem is asking how many kilometers a <math>17</math>-centimeter length represents, so we multiply <math>6</math> by <math>17</math> which is simply
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Since we know <math>12</math> centimeters on the map is equal to <math>72</math> kilometers, <math>1</math> centimeter on the map is simply <math>72/12</math>, which is <math>6</math>. The problem is asking how many kilometers a <math>17</math>-centimeter length represents, so we multiply <math>6</math> by <math>17</math> which is simply 102, your answer.
  
 
==See Also==
 
==See Also==
 
{{AMC8 box|year=2004|before=First <br />Question|num-a=2}}
 
{{AMC8 box|year=2004|before=First <br />Question|num-a=2}}
 
{{MAA Notice}}
 
{{MAA Notice}}

Latest revision as of 03:21, 24 July 2018

Problem

On a map, a $12$-centimeter length represents $72$ kilometers. How many kilometers does a $17$-centimeter length represent?

$\textbf{(A)}\ 6\qquad\textbf{(B)}\ 102\qquad\textbf{(C)}\ 204\qquad\textbf{(D)}\ 864\qquad\textbf{(E)}\ 1224$

Solution

We set up the proportion $\frac{12  \text{cm}}{72  \text{km}}=\frac{17 \text{cm}}{x \text{km}}$. Thus $x=102 \Rightarrow \boxed{\textbf{(B)}\ 102}$

Solution 2

Since we know $12$ centimeters on the map is equal to $72$ kilometers, $1$ centimeter on the map is simply $72/12$, which is $6$. The problem is asking how many kilometers a $17$-centimeter length represents, so we multiply $6$ by $17$ which is simply 102, your answer.

See Also

2004 AMC 8 (ProblemsAnswer KeyResources)
Preceded by
First
Question
Followed by
Problem 2
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All AJHSME/AMC 8 Problems and Solutions

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