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36 kg of gunpowder contains 27 kg of salt, 5.4 kg of charcoal and some amount of sulfur. Find the percentage of sulfur.1. 15%2. 10%3. 8%4. 100% |
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Answer» Correct Answer - Option 2 : 10% Given: Gunpowder = 36 kg Salt = 27 kg Charcoal = 5.4 kg Concept: The percentage of sulfur = (Amount of sulfur / Total amount of gunpowder)× 100 Calculation: Total weight of gunpowder = 36 kg According to the question, Let sulfur be x ⇒ (27 + 5.4 + x) kg = 36 kg ⇒ (32.4 + x) kg = 36 kg ⇒ x = (36-32.4) kg ⇒ x = 3.6 kg The percentage content of sulfur in the gunpowder = (Amount of sulfur / Total amount of gunpowder) 100 ⇒ (3.6/36) × 100% ⇒ 0.1 × 100% ⇒ 10% Therefore, percentage content of Sulfur is 10%. |
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