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Number systems — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsNumber systems1 Mark
MCQ
The value of $\sqrt{20}\times\sqrt{5}$ is :
  • A
    $10$
  • B
    $4\sqrt{5}$
  • C
    $2\sqrt{5}$
  • D
    $20\sqrt{5}$ 
✓

Answer

  1. $10$
    Solution:
    $\sqrt{20}\times\sqrt{5}$
    $=2\sqrt{5}\times\sqrt{5}$
    $=2\times5$
    $=10$

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