9. 60 kg of an alloy of Zinc and Aluminium contains 80% of Zinc. How much Zinc must be
melted into it to make the alloy contains 85% of Zinc ?
Answers
Answered by
3
Answer:
20
Step-by-step explanation:
80% Zinc & 20% Aluminium
12 kg Al, 48 kg Zn
Let the amount of melted Zn that will be added is x
(x + 48)/(x+60) *100 = 85
(x + 48)/(x+60) = 17/20
20x + 960 = 17x + 1020
3x = 60
x = 20
So, adding 20 kg Zinc should be enough .
Answered by
10
Answer:20
Step-by-step explanation:
80% Zinc & 20% Aluminium
12 kg Al, 48 kg Zn
Let the amount of melted Zn that will be added is x
(x + 48)/(x+60) *100 = 85
(x + 48)/(x+60) = 17/20
20x + 960 = 17x + 1020
3x = 60
x = 20
So, adding 20 kg Zinc should enough
Step-by-step explanation:
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