Respuesta :

Answer:

19,000 cm

Step-by-step explanation:

Hope this helps

Answer:

  • 19000 square units

Step-by-step explanation:

It is assumed the rectangular prism with dimensions of 20, 70 and 90

Surface are is calculated by the formula:

  • SA = 2(lw + lh + wh)

Substitute values and find the value:

  • SA = 2(20*70 + 20*90 + 70*90) = 19000 square units