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  • Question
  • 4 kg of a metal contains 1/5 copper and rest in Zinc. Another 5 kg of metal contains 1/6 copper and rest in Zinc.The ratio of Copper and Zinc into the mixture of these two metals:


  • Options
  • A. 49 : 221
  • B. 39:231
  • C. 94:181
  • D. None of these

  • Correct Answer
  • 49 : 221 

    Explanation

    Copper in 4 kg = 4/5 kg          and      Zinc in 4 kg = 4 x (4/5) kg

     

    Copper in 5 kg = 5/6 kg          and      Zinc in 5 kg = 5 x (5/6) kg

     

    Therefore, Copper in mixture =  4 5 + 5 6 = 49 30  kg

     

    and  Zinc in the mixture = 16 5 + 25 6 = 221 30 kg

     

    Therefore the required ratio = 49 : 221


  • Alligation or Mixture problems


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    • 1. A container contains 50 litres of milk. From that 8 litres of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained by the container ?

    • Options
    • A. 24.52 litres
    • B. 29.63 litres
    • C. 28.21 litres
    • D. 25.14 litres
    • Discuss
    • 2. A mixture contains 25% milk and rest water. What percent of this mixture must taken out and replaced with milk so that in mixture milk and water may become equal.

    • Options
    • A. 31.8%
    • B. 31%
    • C. 33.33%
    • D. 29.85%
    • Discuss
    • 3. A man pays Rs. 6.40 per litre of milk. He adds water and sells the mixture at Rs. 8 per litre, thereby making 37.5% profit. The proportion of water to milk received by the customers is

    • Options
    • A. 1 : 10
    • B. 10 : 1
    • C. 9 : 11
    • D. 11 : 9
    • Discuss
    • 4. A jar was full with honey. A person used to draw out 20% of the honey from the jar and replaced it with sugar solution. He has repeated the same process 4 times and thus there was only 512 gm of honey left in the jar, the rest part of the jar was filled with the sugar solution. The initial amount of honey in the jar was filled with the sugar solution. The initial amount of honey in the jar was:

    • Options
    • A. 1.25 kg
    • B. 1 kg
    • C. 1.5 kg
    • D. None of these
    • Discuss
    • 5. In a 48 ltr mixture, the ratio of milk and water is 5:3. How much water should be added in the mixture so as the ratio will become 3:5 ?

    • Options
    • A. 24 lit
    • B. 16 lit
    • C. 32 lit
    • D. 8 lit
    • Discuss
    • 6. A milkman claims to sell milk at its cost price, still, he is making a profit of 30% since he has mixed some amount of water in the milk. What is the % of milk in the mixture?

    • Options
    • A. 71.02%
    • B. 76.92%
    • C. 63.22%
    • D. 86.42%
    • Discuss
    • 7. A jar was full with honey. A person used to draw out 20% of the honey from the jar and replaced it with sugar solution. He has repeated the same process 4 times and thus there was only 512 gm of honey left in the jar, the rest part of the jar was filled with the sugar solution. The initial amount of honey in the jar was:

    • Options
    • A. 1.25 kg
    • B. 1 kg
    • C. 1.5 kg
    • D. None of these
    • Discuss
    • 8. How many liters of oil at Rs. 40 per liter should be mixed with 240 liters of the second variety of oil at Rs.60 per liter so as to get a maximum whose cost is Rs.52 per liter?

    • Options
    • A. 170 liters
    • B. 160 liters
    • C. 150 liters
    • D. 140 liters
    • Discuss
    • 9. In a 40 litre mixture of alcohol & water, the ratio of alcohol and water is 5 : 3. If 20% of this mixture is taken out and the same amount of water is added then what will be the ratio of alcohol and water in final mixture?

    • Options
    • A. 1:1
    • B. 2:1
    • C. 3:1
    • D. 1:2
    • Discuss
    • 10. The amount of water (in ml) that should be added to reduce 9 ml lotion, containing 50% alcohol, to a lotion containing 30% alcohol is ?

    • Options
    • A. 6 ml
    • B. 11 ml
    • C. 15 ml
    • D. 9 ml
    • Discuss


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