Multiple choice

At a chemical manufacturing plant, there are two tanks, X and Y, containing chemical solutions. Tank X holds 50 litres of a solution with 70% concentrated acid, while tank Y contains 30 litres of a solution with 50% concentrated acid. If half of the contents from tank Y is added to tank X, what will be the ratio of acid to water in tank X after the addition?

  1. 13 : 3

  2. 15 : 8

  3. 17 : 9

  4. 28 : 13

  5. a
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C Correct answer
AI explanation

Tank X initially holds 35 litres of acid and 15 litres of water, while half of tank Y adds 15 litres of solution containing 7.5 litres of acid and 7.5 litres of water. After the addition, tank X contains 65 litres of liquid in total, with the acid volume being 35 plus 7.5, which equals 42.5 litres. The water volume becomes 15 plus 7.5, which equals 22.5 litres. The ratio of acid to water is 42.5 divided by 22.5, which simplifies to 17 divided by 9.

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