Gunpowder contains 75% of nitre and 10% of sulphur, and the rest of it

1.	Gunpowder contains 75% of nitre and 10% of sulphur, and the rest of it is charcoal. Find the amount of charcoal in 8 kg of gunpowder.
Answer» The amount of gunpowder = 8 kg = 8000g … [WKT 1 kg = 1000g] Quantity of nitre in gunpowder = 75% of 8000g = (75/100) × (8000) = (75 ×80) = 6000g = 6 kg Quantity of sulphur in gunpowder = 10% of 8000g = (10/100) × 8000 = (10 × 80) = 800g = 0.8 kg The quantity of charcoal in gunpowder = [8000 – (6000 + 800)] = [8000 – 6800] = 1200g = 1.2 kg ∴the quantity of charcoal in 8 kg of gunpowder is 1.2 kg

Gunpowder contains 75% of nitre and 10% of sulphur, and the rest of it is charcoal. Find the amount of charcoal in 8 kg of gunpowder.

Answer»

The amount of gunpowder = 8 kg = 8000g … [WKT 1 kg = 1000g]

Quantity of nitre in gunpowder = 75% of 8000g

= (75/100) × (8000)

= (75 ×80)

= 6000g = 6 kg

Quantity of sulphur in gunpowder = 10% of 8000g

= (10/100) × 8000

= (10 × 80)

= 800g = 0.8 kg

The quantity of charcoal in gunpowder = [8000 – (6000 + 800)]

= [8000 – 6800]

= 1200g

= 1.2 kg

∴the quantity of charcoal in 8 kg of gunpowder is 1.2 kg