A box with a square base has its height twice its width.If the width of the box is 8.5 inches with a possible error of 0.3 inches find the possible error in the volume of the box.?

Area of base lies between 8.2 x 8.2 and 8.8 x 8.8 ie between 67.24 and 77.44.

Height between 16.4 and 17.6 so volume lies between 16.4 x 67.24 and 17.6 x 77.44 ie between and 1102.736 and 1362.944 cuinches, a possible error of 260 and a bit cuinches