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#8174 Bangla Language & Literature General Level 0

In the middle of a round pool lies a water-lily. The water-lily doubles in size every day. After exactly 20 days the complete pool will be covered by the lily. After how many day will half of the pool be covered by the water-lily?

  1. A 10
  2. B 15
  3. C 19
  4. D 3
Answer: C - 19

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