Question 172491
Let x be the unit value. Then the lenght is 6x and the width is 5x. You are told the area (product) is 120

{{{120 = 5x * 6x}}}
{{{120 = 30x^2}}}
{{{4 = x^2}}}
x = 2 and x = -2
Since a length is never negative, the unit value must be {{{2}}}
Then, the length is {{{6*2}}} = {{{12}}}
And the width is {{{5*2}}} = {{{10}}}