ANSWER
190 square inches
EXPLANATION
The surface area of a rectangular prism is calculated using the formula.
[tex]S.A = 2(l \times w + l \times h + w \times h)[/tex]
The jewelry box has dimensions
l=10, w=5 and h=3.
We substitute the values into the formula to obtain,
[tex]S.A = 2(10\times 5+ 10 \times 3 + 5\times 3)[/tex]
This will give us,
[tex]S.A = 2(50+ 30 + 15)[/tex]
[tex]S.A = 2(95) = 190 {in}^{2} [/tex]
