Length of rectanngle is 1 cm more than width. If length of rectangle is doubled the area is increased by 30cm2. find dimensions of original rectangle.

Answer 1

if the length and width are x,y respectively, then

x = y+1
2xy = xy+30

xy=30
x=6,y=5

check:
xy = 6*5 = 30
2xy = 12*5 = 60 = 30+30