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Number System — Maths STD 9 — Question

Maharashtra BoardEnglish MediumSTD 9MathsNumber System1 Mark
MCQ
$\sqrt{10}\times\sqrt{15}=?$
  • A
    $\sqrt{25}$
  • ✓
    $5\sqrt{6}$
  • C
    $6\sqrt{5}$
  • D
    None of these.
✓

Answer

Correct option: B.
$5\sqrt{6}$
$\sqrt{10}\times\sqrt{15}$
$=\sqrt{5\times2}\times\sqrt{5\times3}$
$=\sqrt{5}\times\sqrt{2}\times\sqrt{5}\times\sqrt{3}=5\sqrt{6}$
Hence, the correct answer is option $(b)$.

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