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In one alloy there is 60% gold in its total mass, while in another alloy it is 35%. 12 kg of the first alloy was melted together with 8 kg of the second one to form a third alloy. Find the percentage of gold in the new alloy.
  • a)
    50%
  • b)
    49%
  • c)
    45%
  • d)
    48%
  • e)
    46%
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In one alloy there is 60% gold in its total mass, while in another all...
Amount of gold in 1st alloy = 0.6 × 12 = 7.2 kg.
Amount of gold in 2nd alloy = 0.35 × 8 =2.8 kg.
∴ required % age of gold = (7.2 + 2.8) / (12 + 8) × 100
= (10 / 20) × 100
= 50 %.
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Most Upvoted Answer
In one alloy there is 60% gold in its total mass, while in another all...
Amount of gold in 1st alloy = 0.6 × 12 = 7.2 kg.
Amount of gold in 2nd alloy = 0.35 × 8 =2.8 kg.
∴ required % age of gold = (7.2 + 2.8) / (12 + 8) × 100
= (10 / 20) × 100
= 50 %.
Free Test
Community Answer
In one alloy there is 60% gold in its total mass, while in another all...
Amount of gold in 1st alloy = 0.6 × 12 = 7.2 kg.
Amount of gold in 2nd alloy = 0.35 × 8 =2.8 kg.
∴ required % age of gold = (7.2 + 2.8) / (12 + 8) × 100
= (10 / 20) × 100
= 50 %.
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