The shape of the frame is ectangle with dimensions,
Length l = 15 in
Width w = 10 in.
The formula for the perimeter of rectangle is,
[tex]P=2(l+w)[/tex]Substitute the values in the formula to obtain the perimeter of frame.
[tex]\begin{gathered} P=2(15+10) \\ =2\cdot25 \\ =50 \end{gathered}[/tex]So answer is 50 inch