Question 391654
L=length
W=width
2L+2W=126
L/W = 5/2
L=(5/2)W

2*(5/2)W+2W=126
5W+2W=126
7W=126
W=18
L =(5/2)W=45

check: 2L+2W =2*18+2*45=36+90=126
             L/W = 45/18 =5/2

ans: new width = 18 cm