the length of a rectangle is 40cm and it's one diagonal be41 CM. find its perimeter
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given diagonal of a square √l√+ b square is equals to 41 so as a square + b square is equals to 1681 so length is given 40 cm 40 square is equals to 1600
so,1681-1600=81m^2
=√81=9cm
so,1681-1600=81m^2
=√81=9cm
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