# Pls someone answer question no. 9 fast plzz..it's urgent

Dear Student,

$Lengthofrec\mathrm{tan}gularbox,l=12cm\phantom{\rule{0ex}{0ex}}Breadthofrec\mathrm{tan}gularbox,b=8cm\phantom{\rule{0ex}{0ex}}Lettheheightofrec\mathrm{tan}gularboxbeh.\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}Lengthoflongestrodthatcanbekeptinsidearec\mathrm{tan}gularbox=Lengthofdiagonal=\sqrt{{l}^{2}+{b}^{2}+{h}^{2}}\phantom{\rule{0ex}{0ex}}17cm=\sqrt{{12}^{2}+{8}^{2}+{h}^{2}}\phantom{\rule{0ex}{0ex}}{\left(17\right)}^{2}={12}^{2}+{8}^{2}+{h}^{2}\phantom{\rule{0ex}{0ex}}289=144+64+{h}^{2}\phantom{\rule{0ex}{0ex}}289=208+{h}^{2}\phantom{\rule{0ex}{0ex}}81={h}^{2}\phantom{\rule{0ex}{0ex}}h=\sqrt{81}\phantom{\rule{0ex}{0ex}}\mathit{h}\mathbf{}\mathbf{=}\mathbf{}\mathbf{9}\mathbf{}\mathit{c}\mathit{m}$

Regards

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