Question

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Answer 1

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⠀$\underline{\bf{\dag} \:\mathfrak{Putting\;Values\;in\; formula\: :}}$⠀⠀⠀⠀

$\:\;\;:\implies\sf 34 = \dfrac{1}{\cancel{\;2}} \times \Bigg(10 + x\Bigg) \times \cancel{\;4} \\\\\\:\implies\sf 34 = \Bigg(10 + x\Bigg) \times 2\\\\\\:\implies\sf 34 = 20 + 2x\\\\\\:\implies\sf 34 - 20 = 2x\\\\\\:\implies\sf 14 = 2x\\\\\\:\implies\sf x = \cancel\dfrac{14}{2}\\\\\\:\implies\underline{\boxed{\pmb{\frak{x = 7 ~cm}}}}\;\bigstar$

$\therefore{\underline{\textsf{Hence, the length of other parallel side is \textbf{7 cm}.}}}$