From a rope 15 m long, 4
m is cut off and 
of the remaining is cut off again. Find the length of the remaining part of the rope.
Solution:
Perimeter of a rectangle is 2 m less than 
of the perimeter of a square, if the perimeter of the square is 40 m, find the length and breadth of the rectangle given that the breadth is of the length.
Solution:
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