You add all the money together than divide it have a good day
Thickness of the plate before polishing = 2.342
Thickness of the plate after polishing. = 2.087
How much was removed = 2.342- 2.087 = 0.255
Hence , the answer 0.255 which is option B
12^3 = 1728; 14^3 = 2744;
Undefined terms; assumptions (postulates); definitions; theorems