MCQ
$\sqrt{12} \times \sqrt{15}=$
- A$5$
- B$5 \sqrt{6}$
- ✓$6 \sqrt{5}$
- D$6$
✓
Answer
Correct option: C.
$6 \sqrt{5}$
$\sqrt{12}=\sqrt{3 \times 2^2}=2 \sqrt{3}$ and $\sqrt{15}=\sqrt{5} \times \sqrt{3}$
so,$\sqrt{12} \times \sqrt{15}$
$=2 \sqrt{3} \times \sqrt{3} \times \sqrt{5}$
$=2 \times 3 \sqrt{5}$
$=6 \sqrt{5}$
so,$\sqrt{12} \times \sqrt{15}$
$=2 \sqrt{3} \times \sqrt{3} \times \sqrt{5}$
$=2 \times 3 \sqrt{5}$
$=6 \sqrt{5}$
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