Answer:
width = 23cm
length = 7cm
Explanation:
To solve this we have to make 2 equations that represents the problem
w = width
l = length
p = perimeter = 60cm
p = 2w + 2l
60 = 2w + 2l
w = 2 + 3l
we replace w with (2 + 3l) in the first equation
60 = 2w + 2l
60 = 2 (2 + 3l) + 2l
60 = 4 + 6l + 2l
60-4 = 6l + 2l
56 = 8l
56/8 = l
7cm = l
now we replace the value of l in the second equation
w = 2 + 3l
w = 2 + 3 (7)
w = 2 + 21
w = 23cm