Difference between revisions of "2020 AMC 8 Problems/Problem 1"

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==Solution==
 
==Solution==
 
Luka will need <math>3\cdot 2=6</math> cups of sugar and <math>6\cdot 4=24</math> cups of water. The answer is <math>\boxed{\textbf{(E) } 24}</math>.
 
Luka will need <math>3\cdot 2=6</math> cups of sugar and <math>6\cdot 4=24</math> cups of water. The answer is <math>\boxed{\textbf{(E) } 24}</math>.
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==Solution 2==
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LEt <math>W, S,</math> and <math>L</math> represent the cups of water, sugar, and lemon juice Luka needs for his recipe. We are given that <math>W=4S</math> and <math>S=2L</math>. Since <math>L=3</math>, it follows that <math>S=6</math>, which in turn implies that <math>W=24 </math>\implies\boxed{\textbf{(E) }24}$.<br>
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~jmansuri
  
 
==See also==
 
==See also==
 
{{AMC8 box|year=2020|before=First problem|num-a=2}}
 
{{AMC8 box|year=2020|before=First problem|num-a=2}}
 
{{MAA Notice}}
 
{{MAA Notice}}

Revision as of 03:37, 18 November 2020

Luka is making lemonade to sell at a school fundraiser. His recipe requires $4$ times as much water as sugar and twice as much sugar as lemon juice. He uses $3$ cups of lemon juice. How many cups of water does he need?

$\textbf{(A) }6 \qquad \textbf{(B) }8 \qquad \textbf{(C) }12 \qquad \textbf{(D) }18 \qquad \textbf{(E) }24$

Solution

Luka will need $3\cdot 2=6$ cups of sugar and $6\cdot 4=24$ cups of water. The answer is $\boxed{\textbf{(E) } 24}$.

Solution 2

LEt $W, S,$ and $L$ represent the cups of water, sugar, and lemon juice Luka needs for his recipe. We are given that $W=4S$ and $S=2L$. Since $L=3$, it follows that $S=6$, which in turn implies that $W=24$\implies\boxed{\textbf{(E) }24}$.
~jmansuri

See also

2020 AMC 8 (ProblemsAnswer KeyResources)
Preceded by
First problem
Followed by
Problem 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
All AJHSME/AMC 8 Problems and Solutions

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