Answer:
[tex] 12m {n}^{3} - 15yds[/tex]
Step-by-step explanation:
Given,
One side of an equilateral triangle
[tex] = (4mn^3 - 5)yds[/tex]
Therefore,
Perimeter of the equilateral triangle
[tex] = 3 \times side[/tex]
[tex] = 3 \times (4mn^3 - 5)yds[/tex]
[tex] = 12m {n}^{3} - 15yds(ans)[/tex]
