AFCAT Model Paper 10

Given:
Alloy A contains metals gold and bronze in the ratio 5 : 8
Alloy B contains these metals in the ratio 3 : 10
Alloy C is prepared by mixing A and B in the ratio 1 : 1
Calculations:
Alloy A
⇒ gold = 5/13, bronze = 8/13Alloy B⇒ gold =

3

13

, bronze =

10

13

⇒ gold =(

5

13

)+(

3

13

)=

8

13

⇒ bronze =(

8

13

)+(

10

13

)=

18

13

⇒ Ratio of gold to bronze =

8

13

:

18

13

⇒ 8 : 18
⇒ Ratio of bronze to gold = 9 : 4
∴ Ratio of bronze to gold is 9 : 4.