Pakistan Academy for Competitive Exams
Pakistan Academy for Competitive Exams
Q.If the length and breadth of a rectangular room are each increased by 1 m, then the area of the floor is increased by 21 sq. m. If the length is increased by 1 m and the breadth is decreased by 1 m, then the area is decreased by 5 sq. m. The perimeter of the floor is:

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