Difference between revisions of "2012 AMC 10A Problems/Problem 1"
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<math> \textbf{(A)}\ 10\qquad\textbf{(B)}\ 15\qquad\textbf{(C)}\ 20\qquad\textbf{(D)}\ 25\qquad\textbf{(E)}\ 30 </math> | <math> \textbf{(A)}\ 10\qquad\textbf{(B)}\ 15\qquad\textbf{(C)}\ 20\qquad\textbf{(D)}\ 25\qquad\textbf{(E)}\ 30 </math> | ||
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| + | == Solution == | ||
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| + | Cagney can frost three cupcakes every minute and Lacey can frost two cupcakes every minute. Working together, they can frost five cupcakes every minute and therefore 25 cupcakes in five. | ||
Revision as of 18:22, 8 February 2012
Problem
Cagney can frost a cupcake every 20 seconds and Lacey can frost a cupcake every 30 seconds. Working together, how many cupcakes can they frost in 5 minutes?
Solution
Cagney can frost three cupcakes every minute and Lacey can frost two cupcakes every minute. Working together, they can frost five cupcakes every minute and therefore 25 cupcakes in five.
