Respuesta :
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