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What will come in place of question mark (?) in the given questions ?
Expression : 5/9 $$\times$$ (225.40-45.4)=$$?^{2}$$
=> $$\frac{5}{9} \times 180 = (x)^2$$
=> $$5 \times 20 = (x)^2$$
=> $$(x)^2 = 100$$
=> $$x = \sqrt{100} = 10$$
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