CBSE Class 10 English Communicative Question Paper 2018 with Answer Key (March 12, Set 1 - 1/1)

CBSE X Questions

• 1.

  The value of p for which roots of the quadratic equation $x^2 - px + 6 = 0$ are rational, is

  • $1$
  • $-5$
  • $25$
  • $\sqrt{5}$
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• 2.

  Prove that: $\frac{\tan \theta}{1 - \cot \theta} + \frac{\cot \theta}{1 - \tan \theta} = 1 + \tan \theta + \cot \theta$

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• 3.

  If the zeroes of a polynomial p(x) are $-3$ and 8, then p(x) equals

  • $x^2 + 5x - 4$
  • $(x + 3) (-x + 8)$
  • $a(x^2 + 5x - 24)$
  • $x^2 - 24$
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• 4.

  In the given figure, $AB \parallel DE$ and $AC \parallel DF$. Show that $\Delta ABC \sim \Delta DEF$. If $BC = 10\text{ cm}$, $EB = CF = 5\text{ cm}$ and $AB = 7\text{ cm}$, then find the length $DE$.
  

  

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• 5.

  Two water taps together can fill a tank in $8\frac{8}{9}$ hours. The tap of larger diameter takes 4 hours less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.

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• 6.

  How does the change in curvature of the eye lens help us in the process of seeing the nearby objects clearly?

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