Question

Gunpowder contains 75per cent nitre ,15 per cent charcoal and the rest is sulphur.find the weight of charcoal and sulphur in 3 kg of gun powder.

Answer 1

Answer:

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

Quantity of nitre in gunpowder =75% of 8000 g

=(75/100)×(8000)

=(75×80)

=6000 g=6 kg

Quantity of sulphur in gunpowder =10% of 8000 g

=(10/100)×8000

=(10×80)

=800 g=0.8 kg

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

=[8000−6800]

=1200 g

=1.2 kg

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