Question 516897
volume: THREE dimensional: length x heigth x width(or "deep", it doesn't matter what you call it, as long as there are three dimensions): 10 x 3 x 4 = 120 inches cubed, or "cubic inches".

surface area: TWO dimensional: add up each face of the box: that is, the area of each of the six sides. two opposite sides are 3 x 4 = 12; two are 3 x 10 = 30, two are 4 x 10 = 40: 
add them up, 
2*12 + 2*30 + 2*40 
24 + 60 + 80
= 164
Surface area of the exterior sides of the box = 164 in. squared, or "square inches"