|A) 10cm||B) 20cm|
|C) 30cm||D) 40cm|
Let the breadth of the given rectangle be x then length is 2x.
thus area of the given rect is
after dec 5cm from length and inc 5cm breadth , new lenght becomes 2x-5 and breadth is x+5.thus new area =(2x-5)(x+5)=
since new area is 75 units greater than original area thus
hence length of the rectangle is 40 cm.