Question 746776



{{{
l=3w+7
}}}

and

{{{
P=2(l+w)
}}}

and so

{{{
38=2(l+w)
}}}

or...

{{{
l+w=19
}}}

and so...


{{{
(3w+7)+w=19
}}}

{{{
3w+w+7-7=19-7
}}}

{{{
4w=12
}}}

so w=3

and thus l=3w+7=3(3)+7=16

this gives us an area of (3)(16)=48 cm squared