Day 269: CDS Maths

1. A.
   24 square unit
2. B.
   36 square unit
3. C.
   48 square unit
4. D.
   72 square unit

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1. A.
   $\frac{2r^2}{R - r}$
2. B.
   $\frac{2R^2}{R - r}$
3. C.
   $\frac{2(r^2 + R^2)}{R - r}$
4. D.
   $\frac{r^2 + R^2}{R - r}$

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1. A.
   $\frac{2r^2 \tan\theta}{R - r}$
2. B.
   $\frac{2R^2 \tan\theta}{R - r}$
3. C.
   $\frac{2(r^2 + R^2)\tan\theta}{R - r}$
4. D.
   $\frac{(r^2 + R^2)\tan\theta}{R - r}$

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1. A.
   100
2. B.
   110
3. C.
   115
4. D.
   120

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1. A.
   6% loss
2. B.
   6% gain
3. C.
   9% loss
4. D.
   9% gain

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1. A.
   $\sqrt{3}x + \sqrt{2}y - \sqrt{3}$
2. B.
   $\sqrt{3}x + \sqrt{2}y - \sqrt{6}$
3. C.
   $3x^2 + 2y^2 - \sqrt{18}x - \sqrt{12}y - \sqrt{6}xy + 6$
4. D.
   $3x^2 + 2y^2 + \sqrt{18}x + \sqrt{12}y - \sqrt{6}xy + 6$

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