Answer:
510
Step-by-step explanation:
surface area= 2lw+2lh+2hw
sa= 2*7*12+2*7*9+2*9*12
sa= 510
Answer:
A~363
Step-by-step explanation:
Surface Area =
[(Length x Width) + (Length x Height) + (Width x Height)] x 2
(7x12)+(7x9)+(12x9)x2
84+63+108x2=363
A~363
hope this helps, have a good day :-)