Question 13426

let w =x
    l=x+30
perimeter (p)=200  
p=2(l*w)=200
l*w=200/2
l*w=100
put values of l and w
l=x+30  and   w=x
x+30+x=100
2x+30 =100
 2x   =70
   x  =35
   w  =35
   l  =35+30=65

area =l*w
     =65*30
     =2275