Question

Kara used the formula P=2(l+w) to find the perimeter of the photograph. She tells Jim that the length is 6 cm, and the perimeter is 22 cm. How can Jim find the width of the photo?

Answer 1

$Given\\ Perimeter (P) = 22cm \\ Length (l) = 6cm \\\\ We\ know, \\ P=2(l+w)\\ 22=2(6+w)\\ 2(6+w)=22\\\\ 6+w = \frac{22}{2}\\\\ w=11-6 \\\\ \boxed {w=5cm }$