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2014-06-19T10:58:46+05:30

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To have same no of plants required to fill the row and column so the no of plants must be a square no .
so 1000 is not a perfect square as per question adding plant is required so the nearest perfect square no is 1024 which is a square of 32 
so he will need 1024- 1000= 24 more plants 
so that the column and row has same no of plants that is 32.
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