1. 120 grams
  2. 140 grams
  3. 240 grams
  4. 280 grams
  5. None of these

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Answer: Option 3

The seven pieces consist of 6 smaller equal pieces and one half cake piece. Weight of each small piece = 20 g. So, total weight of the cake = [2 x (20 x6)]g= 240 g.

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