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lisabon 2012 [21]
3 years ago
12

A picture framer has a thin board 10 1/2 feet long. The framer notices that 2 3/8 feet of the board is scratched and cannot be u

sed. The rest of the board will be used to make small picture frames. Each picture frame needs 1 2/3 feet of the board. At most, how many complete picture frames can be made?
Mathematics
1 answer:
Anestetic [448]3 years ago
6 0

1. Find how many of the board can be used for picture frames:

10\dfrac{1}{2}-2\dfrac{3}{8}=\dfrac{21}{2}-\dfrac{19}{8}=\dfrac{21\cdot 4-19}{8}=\dfrac{65}{8}\ ft.

2. Each picture frame needs 1\dfrac{2}{3}=\dfrac{5}{3} feet of the board, then the farmer can complete

\dfrac{65}{8}:\dfrac{5}{3}=\dfrac{65}{8}\cdot \dfrac{3}{5}=\dfrac{39}{8}=4\dfrac{7}{8}

picture frames.

Answer: at most he can complete 4 picture frames.

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