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Q.

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a

20 y =60 x - x2240

b

y = x -x2240  y=\sqrt{3}x-\frac{{{x}^{2}}}{120}

c

30 y =y=\frac{x}{\sqrt{3}}-\frac{{{x}^{2}}}{480}x - x280

d

y = 30 x - x280\vec{u}\,\,=\,\,\left( 20\hat{i}+20\sqrt{3}\hat{j} \right)

answer is B.

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Detailed Solution

y =x tan 450 (1 - x240) =x - x2240
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