Respuesta :

the answer is 843cm^2

Happy to help! :)
surface area formula= 2(lenght×width)+2(lenght×height)+2(height×width)
let's say
lenght:6.5
width:11
height:20
2(6.5×11)+2(6.5×20)+2(20×11)
2(71.5)+2(130)+2(220)
143+260+440
843= is your answer

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