Respuesta :

9514 1404 393

Answer:

  98 cm

Step-by-step explanation:

Area is the product of length and width. Fill in the given numbers in the formula and solve for length:

  A = LW

  8428 cm² = (86 cm)L

  L = 8428 cm²/(86 cm) = 98 cm . . . . . divide both sides by 86 cm

The length of the painting is 98 cm.