Question

Gun-powder contains 75% nitre , 15% charcoal and the rest of it is charcoal. find the total weight of charcoal and sulphur of sulphur in 3 kg of gun -powder.

Answer 1

Answer:

we have 75 percent of niter

15percent of charcoal

rest of charcoal=

(75 +15)=95

100-95=5

therefore we have 15+5=20percent of charcoal

Answer 2

The question seems to have some errors.

Correct question may be:

Gun-powder contains 75% nitre , 15% charcoal and the rest of it is sulphur. find the total weight of charcoal and sulphur in 3 kg of gun -powder.

Solution:

Weight of charcoal=(15/100)×3 kg

=45/100 kg

=0.45 kg =450 g

Percentage of sulphur=100-(75+15)

=100-90 = 10 °/•

Weight of sulphur=(10/100)×3

=3/10 = 0.3 kg =300 g

Weight of nitre=(75/100)×3

=225/100 = 2.25 kg =2250 g