Question 359555
l = 3w-4 : length equals 3 times width minus four
 
p = 2l + 2w = 6w - 8 + 2w = 8w - 8 = 160 
 
 hence w - 1 = 20, w = 21 cm
 
=> l = 63 - 4 = 59 cm
 
Verification : p = 59*2 + 2*21 = 118 + 42 = 160 cm