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There are two solutions of sulphuric acid (ac

There are two solutions of sulphuric acid (acid + water) with concentration of 50% and 80% respectively. They are mixed in a certain ratio to get a 62% sulphuric acid solution. This solution is mixed with 6 litres of water to get back 50% solution. How much of the 80% solution has been used in the entire process?

  • Option 1)

    15 litres

  • Option 2)

    12 litres

  • Option 3)

    10 litres

  • Option 4)

    20 litres

  • Option 5)

    None of these

Answers (1)
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\frac{3X}{2X}+6=\frac{1}{2} = 3x = 2x+6

x = 6

Quantity of 80 % solution = 6X2 = 12 L

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