Question

$\sqrt{10}\times \sqrt{15}=$

• A. $6\sqrt{5}$
• B. $5\sqrt{6}$
• C. $25$
• D. $10\sqrt{5}$

Answer 1

The correct option is B

$5\sqrt{6}$

$\sqrt{10}\times \sqrt{15}$

$=\sqrt{10\times 15}$

$=\sqrt{2\times 5\times 3\times 5}$

$\sqrt{5^2\times 2\times 3}$

$=5\sqrt{6}$