Question

solve this question please

Answer 1

ans- A )81
Sum of perpendicular distances= Height of ∆

So the height of triangle is
6√3 + 9√3 + 12√3= 27√3

We know
$heightof \: equilateral \: triangle \: = \\ \frac{ \sqrt{3} }{2} \times a = 27 \sqrt{3 } \\ a = 54$
a means side of triangle
so semi perimeter of triangle is 81 cm.
$\frac{3a}{2} \\ \frac{3 \times 54}{2 } \\ 81$