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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The quantity (in grams) of copper to be added to it to make the ratio 3 : 2 is
- a)100
- b)120
- c)125
- d)150
Correct answer is option 'A'. Can you explain this answer?
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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The qua...
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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The qua...
Given:
- Copper and zinc are in the ratio 2:3 in an alloy
- Total weight of alloy = 200 g
To find:
- Quantity of copper to be added to make the ratio 3:2
Approach:
- Let's assume that the quantity of copper in the alloy is 2x and the quantity of zinc is 3x (according to the ratio given)
- So, the total quantity of the alloy can be written as 2x + 3x = 5x
- We know that the total weight of the alloy is 200 g. Hence, we can write:
5x = 200
x = 40
- So, the quantity of copper in the alloy is 2x = 2*40 = 80 g
- And the quantity of zinc in the alloy is 3x = 3*40 = 120 g
- Now, we need to add copper to make the ratio 3:2, which means we need to add more copper to the existing copper in the alloy.
- Let the quantity of copper to be added be y.
- So, the new quantity of copper will be (80+y) and the new quantity of zinc will be 120.
- We need to make the ratio of copper and zinc 3:2. Hence, we can write:
(80+y)/120 = 3/2
- Solving the above equation, we get:
y = 100 g
Therefore, the quantity of copper to be added to make the ratio 3:2 is 100 g. Hence, the correct answer is option A (100).
- Copper and zinc are in the ratio 2:3 in an alloy
- Total weight of alloy = 200 g
To find:
- Quantity of copper to be added to make the ratio 3:2
Approach:
- Let's assume that the quantity of copper in the alloy is 2x and the quantity of zinc is 3x (according to the ratio given)
- So, the total quantity of the alloy can be written as 2x + 3x = 5x
- We know that the total weight of the alloy is 200 g. Hence, we can write:
5x = 200
x = 40
- So, the quantity of copper in the alloy is 2x = 2*40 = 80 g
- And the quantity of zinc in the alloy is 3x = 3*40 = 120 g
- Now, we need to add copper to make the ratio 3:2, which means we need to add more copper to the existing copper in the alloy.
- Let the quantity of copper to be added be y.
- So, the new quantity of copper will be (80+y) and the new quantity of zinc will be 120.
- We need to make the ratio of copper and zinc 3:2. Hence, we can write:
(80+y)/120 = 3/2
- Solving the above equation, we get:
y = 100 g
Therefore, the quantity of copper to be added to make the ratio 3:2 is 100 g. Hence, the correct answer is option A (100).
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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The qua...
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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The quantity (in grams) of copper to be added to it to make the ratio 3 : 2 isa)100b)120c)125d)150Correct answer is option 'A'. Can you explain this answer?
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Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The quantity (in grams) of copper to be added to it to make the ratio 3 : 2 isa)100b)120c)125d)150Correct answer is option 'A'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The quantity (in grams) of copper to be added to it to make the ratio 3 : 2 isa)100b)120c)125d)150Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Copper and zinc are in the ratio 2 : 3 in 200 gms of an alloy. The quantity (in grams) of copper to be added to it to make the ratio 3 : 2 isa)100b)120c)125d)150Correct answer is option 'A'. Can you explain this answer?.
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