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If the area of a rectangular plot increases by 30% while its breadth remains the same, what will be the ratio of the new area to the old area?
  1. 4:3
  2. 10:7
  3. 3:2
  4. None of these
Explanation

  • Old area = A

  • New area = A + 30% of A = 1.3A

So, the ratio of new area : old area =

1.3AA=1.3:1=1310frac{1.3A}{A} = 1.3 : 1 = frac{13}{10}10​

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