Question 872281
Given:

Area = 4800 ft.

L=3W

Formula Area=LxW

Substitute: the L in the formula will be 3W.

{{{4800=(3W)(W)}}}

{{{4800=3(W^2)}}}

{{{4800/3=(3(W^2))/3}}}

{{{4800/3=(3(W^2))/3}}}

{{{1600=W^2}}} get the square root of both sides 

{{{W=40}}}