✔ 最佳答案
a) the lower limit of the actual length
=10x10x(1-1%)
=99mm
the upper limit of the actual length
=10x10x(1+1%)
=101mm
b)the area of the face
=100x100
=10000mm^2
the lower limit of the actual area
=99x99
=9801mm^2
the percentage error of the area of the face
=100%-(9801/10000)x100%
=100%-98.99%
=1.99%
the upper limit of the actual area
=101x101
=10201mm^2
the percentage error of the area of the face
=(10201/10000)x100%-100%
=102.01%-100%
=2.01%
c)the volume of the cube
=100x100x100
=1000000mm^3
the lower limit of the actual volume of the cube
=99x99x99
=970299mm^3
the percentage error of the volume of the cube
=100%-(970299/1000000)x100%
=100%-97.0299%
=2.9701%
the upper limit of the actual volume of the cube
=101x101x101
=1030301mm^3
the percentage error of the volume of the cube
=(1030301/1000000)x100%-100%
=103.0301%-100%
=3.0301%