Question

The area of an equilateral triangle is 100 root 3 m square find perimeter

Answer 1

$\frac{ \sqrt{3} }{4} \times {r}^{2} = area \: of \: equilteral \: triangle$
$\sqrt{3} {r}^{2} = 100 \sqrt{3} \times 4$
${r}^{2} = \frac{100 \sqrt{3} \times 4 }{ \sqrt{3} }$
${r }^{2} = 400$
$r = 20$
$perimeter \: = 20 + 20 + 20$
$ans = 60 cm$