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Question

The length in metres of the side of a square with an area of 1600 m2 is __ metres.

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Solution

If the side of a square is a, its area is a2.

According to question,

a2 = 1600
a2 = 2*2*2*2*10*10
a = 22–––22–––1010––––––

2210
a = 40 m


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