Answer-The station master decides that the length and breadth of the rectangular digital board should be 8%...

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Let length and breadth of the rectangular board be x and y respectively.  As we know,  Area of the rectangle  xy  New length of the rectangular board  x x 108100  1.08x  New breadth of the rectangular board  y x 98100  0.98y  New area of the rectangular board  1.08x x 0.98y  1.0584xy    Area increased by in   1.0584xy-xyxy x 100  5.84

The station master decides that the length and breadth of the rectangular digital board should be 8% larger and decrease by 2%, respectively. Find out the total change in the area.

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