Answer:
The ratio of length to breadth is 3:4
let the length be 3x
breadth be 4x
area = 4x x 3x
6912 = 12x^2
x^2 = 576
x=24
length= 72
breadth =96
actually length will be greater than breadth
so the ratio must be 4:3 then alter the above length and breadth values
