Question

The area of square piece is 1225sq.m.What is its length?

Answer 1

Let the side of the square be a
${a}^{2} = 1225 \\ a \: \: = 35$
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Answer 2

area of square = side²

=> 1225 m² = side²

=> √1225m² = side  

=> √35m × 35m = side

=> 35m = side