Given
Length : Breadth = 7 : 5
Let Length = 7x , Breadth = 5x
Increase in length = 6cm
New Length = 7x + 6, Breadth = 5x
[1 mark]
7x+6:5x=2:1
7x+65x=21
7x+6=10x
3x=6 x=2
Length of orignal rectangle = 2 x 7=14 cm
Breadth of orignal rectangle = 2 x 5= 10 cm
[1 mark]