<PRE><B>Question 760737</B>
Length of rectangle = l = 56 cm
Breadth of rectangle = b = 42 cm
Since angle between length and breadth is 90 
therefore, By using Pythagoras theorem, we get
  56^2 + 42^2 = x^2
 3136 + 1764 = x^2
  4900 = x^2
  Sqrt 4900 = x
  70 = x
Also length of diagonal of rectangle is equal 
Therefore length of each diagonal is 70 cm
 
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