Respuesta :

Answer:

12.9 m

Step-by-step explanation:

Let length = 3x, then breadth is 2x

if breadth is 8.6 m, so 2x = 8.6 m, x = 8.6/2 = 4.3 m

length = 3x = 3* 4.3 = 12.9 m

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