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Grade 2
Fence problem
A farmer built a fence around his square plot. He used 87 fence poles on each side of the square. How many poles did he need altogether?
344
337
336
346
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Explanation
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Since each pole at the corner of the plot is common to its two sides, so we have :
Total number of poles needed = 87 × 4 - 4 = 348 - 4 = 344.
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