Question 1183020

given:

The length of a rectangle of {{{4}}} cm less than triple it’s width,

{{{L=3W-4}}}....eq.1

if the perimeter of the rectangle is {{{124}}}, we have

{{{2(L+W)=124}}}....substitute {{{L}}} from eq.1

{{{2(3W-4+W)=124}}}

{{{4W-4=124/2}}}

{{{4W=62+4}}}

{{{W=66/4}}}

{{{W=16.5}}}

then

{{{L=3*16.5-4}}} 

{{{L=45.5}}} 


 the length is {{{45.5}}} cm and width is {{{16.5}}} cm