Question

Calculate the percentage of silver

Answer 1

Answer:

x:3

y:100

10:90−y

∴

3

90−y

=

x

10

----------------------1

2

84−y

=

x

6

-------------------2

Dividing Equation 1 & Equation 2, we get

180−2y=420−5y

⇒3y=240

⇒y=80

⇒x=

90−80

30

=

10

30

=3kg

Quantity of silver in x=80%ofx

=0.83ofx=2.4kg

Weight and percentage of silver=2.4kg or 80%