Question 252930
First a couple of formulas:
{{{A = LW}}}
{{{P = 2L + 2W}}}
the length of a rectangle is 3 times its width translates to
{{{L = 3W}}}
we are given A = 147.
{{{ 147 = 3W*W}}}
{{{147 = 3W^2}}}
{{{49 = W^2}}}
W = 9 cm.
L = 27 cm.
P = 2(9) + 2(27) = 18 + 54 = 72 cm.