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      Question

      (210/3)% of the raindrops could have been collected,

      when 3 cm of rain has fallen on a part of land of area 2 km2, in a tank having a 200 m Γ— 10 m base, then water collected in the tank is 60% of its capacity. Find the capacity of the tank?Β 
      A 400000 mΒ³ Correct Answer Incorrect Answer
      B 280000 mΒ³ Correct Answer Incorrect Answer
      C 140000 mΒ³ Correct Answer Incorrect Answer
      D 142500 mΒ³ 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, β‡’ 3/100 Γ— 2000 Γ— 2000 Γ— 210/300 = 200 Γ— 10 Γ— h β‡’ h = 42 m Volume of water in the tank = 200m Γ— 10m Γ— 42m = 84000 m3 Since, water in the tank is 60% of its capacity. So, capacity of tank = (84000/60) Γ— 100 = 140000 m3

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