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Q-Answer the following questions:-

[a]The cost of painting a rectangular metal sheet is square of its area.If the length and breadth of the rectangle are 2xy and 3x2y,find the cost.Given that area of a rectangle is the product of its length and breadth.

[b]Aarushispends rs x daily and saves rs y per week.how much money she saves in xy2 weeks?

$\left(\mathbf{a}\right)\phantom{\rule{0ex}{0ex}}\mathit{G}\mathit{i}\mathit{v}\mathit{e}\mathit{n}:Length=2xy,breadth=3{x}^{2}y\phantom{\rule{0ex}{0ex}}Areaofrec\mathrm{tan}gularsheet=length\times breadth\phantom{\rule{0ex}{0ex}}Area=2xy\times 3{x}^{2}y\phantom{\rule{0ex}{0ex}}Area=6{x}^{3}{y}^{2}\phantom{\rule{0ex}{0ex}}Costofpainting={\left(Area\right)}^{2}\phantom{\rule{0ex}{0ex}}Costofpainting={\left(6{x}^{3}{y}^{2}\right)}^{2}\phantom{\rule{0ex}{0ex}}\overline{)Costofpainting=36{x}^{6}{y}^{4}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\left(\mathit{b}\right)Solvingthequestionbytakingtimeas2weeks\phantom{\rule{0ex}{0ex}}Aarushispendsxrsdaily,soin1wwekshespendsRs\left(x\times 7\right)=Rs7x\phantom{\rule{0ex}{0ex}}IncomeofAarushifor1week=Rs7x+Rsy=Rs\left(7x+y\right)\phantom{\rule{0ex}{0ex}}IncomeofAarushifor2weeks=Rs\left[2\times \left(7x+y\right)\right]\phantom{\rule{0ex}{0ex}}\overline{)IncomeofAarushifor2weeks=Rs\left(14x+2y\right)}$

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