Day 308: CDS Maths

1. A.
   $16\pi$ square cm
2. B.
   $18\pi$ square cm
3. C.
   $20\pi$ square cm
4. D.
   $24\pi$ square cm

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1. A.
   $2\sqrt{\frac{2}{3}}\,r$ unit
2. B.
   $\frac{\sqrt{3} + 2\sqrt{2}}{\sqrt{2}}r$ unit
3. C.
   $\frac{r}{3 - 2\sqrt{2}}$ unit
4. D.
   $\frac{\sqrt{3} + 2\sqrt{2}}{\sqrt{3}}r$ unit

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1. A.
   91
2. B.
   90
3. C.
   13
4. D.
   12

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1. A.
   $\sqrt{2}$
2. B.
   2
3. C.
   $-\sqrt{2}$
4. D.
   1

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1. A.
   Half the sum of the diagonals
2. B.
   Sum of the other pair of opposite sides
3. C.
   Sum of two adjacent sides
4. D.
   None of the above

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