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If Twelve cubes are stacked itssurfacearea is: 36a² and how would the surfaceareachange if the top two cubes are removed is 6a².Surface areaa. Surface areaIf thelengthof one side is a the area of one surface is a²Hence,Area=a²a²(6+6+6+6+6+6)=36a²b. Change in surfaceareachange if the top two cubes are removed:a²(6×2+5×2+4×2)a²(12 + 10 + 8)=30a²Hence,36a²-30a²=6a²Therefore If Twelve cubes are stacked itssurfacearea is: 36a² and how would the surfaceareachange if the top two cubes are removed is 6a².Learn more aboutsurface areahere:brainly.com/question/16519513#SPJ1...