Question 141756
Diagonal of rectangle=20
Breadth of rectangle=x
Length of rectangle=3x
Therefore by pythagoros theorem,
 "3x"square + "x"square="20"square
 "4x"square = 400
  "x"square = 400/4
  "x"square = 100
   x = 10
 
Thus, Breadth = 10
      Length = 3x
             = 3*10
             = 30