Respuesta :
her mistake is that shes not supposed to add shes first supposed to multiply each expression (2*3*11) and multiply (2*3*10) and then subtract 230 from 253
Answer:
She added 8 cm and 3 cm.
Step-by-step explanation:
The correct dimensions would be ( 2 x 3 x 8 ) + ( 2 x 3 x 10 ) . So the answer would be 108 cubic units.