If the length of a rectangle is increased in the ratio 6:7 and its breadth is diminished in the ratio 5:4 then its area will be diminished in the ratio.

• If initial and final lengths are 6x and 7x respectively
  and
  initial and final breadths are 5y and 4y respectively,
  
  initial area = 30 xy units
  new area= 28 xy units
  Ratio of initial area to final area = 30xy:28 xy = 15:14
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