Question

gunpowder contains 75% of nitre and 10% of sulphur,and the rest of its charcoal.find the amount of charcoal in 8 kg of gun powder.

Answer 1

Hi friend , Here's the required answer:-

In a gunpowder,

Nitre = 75℅
Sulphur= 10℅
Then charcoal = 100- (75+10)= 15℅

So the amount of charcoal in 8 kg gunpowder = 15℅ of 8 = 15/100×8= 3/5× 2= 6/5= 1.2 kg.

Hope this helps you...

Answer 2

given
nitre = 75℅ 
sulphur= 10℅
∴ charcoal = 100- (75+10)= 15℅

∴ the amount of charcoal in 8 kg gunpowder = 15℅ of 8
= 15/100×8
= 3/5× 2
= 6/5
= 1.2 kg.