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      Question

      (180/3)% of the raindrops could have been collected,

      when 8 cm of rain has fallen on a part of land of area 2.5 km2, in a tank having a 200 m × 10 m base, then water collected in the tank is 75% of its capacity. Find the capacity of the tank?
      A 400000 m┬│ Correct Answer Incorrect Answer
      B 280000 m┬│ Correct Answer Incorrect Answer
      C 140000 m┬│ Correct Answer Incorrect Answer
      D 142500 m┬│ Correct Answer Incorrect Answer
      E 202500 m┬│ Correct Answer Incorrect Answer

      Solution

      The volume of rain water in the land which could have been collected and the volume of water in the tank should be equal . Let, level of water in the tank is h meter. According to the question, ⇒ 8/100 × 2500 × 2500 × 180/300 = 200 × 10 × h ⇒ h = 150 m Volume of water in the tank = 200m × 10m × 150m = 300000 m3 Since, water in the tank is 75% of its capacity. So, capacity of tank = (300000/75) × 100 = 400000 m3

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