Day 81: CDS Maths

1. A.
   $\dfrac{3}{2}$ hours
2. B.
   $\dfrac{4}{3}$ hours
3. C.
   $\dfrac{9}{8}$ hours
4. D.
   $\dfrac{11}{8}$ hours

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1. A.
   $1 : 2 : 3$
2. B.
   $3 : 4 : 5$
3. C.
   $5 : 6 : 7$
4. D.
   $6 : 7 : 8$

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1. A.
   $d < 26$ cm
2. B.
   $26$ cm $< d < 27$ cm
3. C.
   $27$ cm $< d < 28$ cm
4. D.
   $d > 28$ cm

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1. A.
   $4(3 - \sqrt{2})$ cm
2. B.
   $4(3 - 2\sqrt{2})$ cm
3. C.
   $8(3 - \sqrt{2})$ cm
4. D.
   $8(3 - 2\sqrt{2})$ cm

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1. A.
   $\frac{(x + y + z)^2}{xyz}$
2. B.
   $\frac{\sqrt{xyz}}{x + y + z}$
3. C.
   $\sqrt{\frac{x}{y} + \frac{y}{z} + \frac{z}{x}}$
4. D.
   $\sqrt{\frac{xy + yz + zx}{xyz}}$

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