Question 877921
That looks right.  Why be stuck?


w for width
L for length
w=3L
-
{{{2w+2L=128}}}
{{{2(3L)+2L=128}}}
{{{6L+2L=128}}}
{{{8L=128}}}
{{{L=128/8=(64*2)/8}}}
{{{highlight(L=16)}}}
-
From given w=3L,
{{{w=3*16=3(8+8)=24+24=48}}}
{{{highlight(w=48)}}}