The surface area of the box is 78in²
To determine the surface area, we have that the formula is expressed as;
S.A = 2(wl + hw + hl)
Such that the parameters of the formula are;
- S.A is the surface area
- l is the length
- w is the width
- h is the height
Now, substitute the values, we have;
Surface area = 2 ( 3×3 + 3 ×5 + 5×3)
multiply the values, we get;
Surface area = 2(9 + 15 + 15)
add the values
Surface area = 2(39)
multiply the value
Surface area = 78in²