Question 122505


Given:

{{{P = 50 cm}}}

The length {{{L}}}is {{{7 cm}}} more than the width {{{W}}}…=> {{{L= W + 7cm}}}


{{{P = L *W}}}

{{{50 cm = 2(L + W)}}}

{{{50 cm = 2(W + 7cm + W)}}}

{{{50 cm = 2(2W + 7cm)}}}

{{{25 cm = 2W + 7cm}}}

{{{25 cm - 7cm = 2W }}}

{{{18 cm = 2W }}}

{{{W = 9 cm }}}

…=> {{{L= 9 cm + 7cm}}}

{{{L= 16 cm }}}


Check:

{{{50 cm = 2(16 cm + 9 cm)}}}

{{{50 cm = 2(25cm)}}}

{{{50 cm = 50cm}}}