Question 1178111


The length of a rectangle is three times the width:

{{{L=3W}}}


if the area is {{{147}}} square feet:


{{{L*W=147}}}.........substitute {{{L}}}

{{{3W*W=147}}}

{{{W^2=147/3}}}

{{{W^2=49}}}

{{{highlight(W=7)}}}->the width of  a rectangle

then {{{L=3*7=21}}}