Multiple choice

Choose the correct answer from the alternatives given: The ratio of copper and zinc in the mixture is 5 : 2. If 1.25 kg of zinc is added to 17.5 kg of mixture. Find the ratio of copper and Zinc in the new mixture.

  1. 1:2

  2. 2:1

  3. 2:3

  4. 3:2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Initial mixture: 17.5 kg, ratio 5:2. Copper = 12.5 kg, Zinc = 5 kg. Add 1.25 kg Zinc. New Zinc = 6.25 kg. New ratio = 12.5 : 6.25 = 2 : 1.

AI explanation

In the original 17.5 kg mixture, the ratio of copper to zinc is 5 to 2, meaning copper is 5/7 of the mixture and zinc is 2/7. This gives 12.5 kg of copper and 5 kg of zinc. After adding 1.25 kg of zinc, the new zinc mass is 6.25 kg. The new ratio of copper to zinc is 12.5 to 6.25, which simplifies to 2 to 1.

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