Question

An alloy consists of nickel, zinc, and copper in the ratio 2:7:9. How much of each metal is needed to make 3.6 kg of this alloy?An alloy consists of nickel, zinc, and copper in the ratio 2:7:9.

Answer 1

1.8 cooper considering its half 9:18
1.4 zinc 7:18
0.4 nickel 2:18

Answer 2

Answer: Nickel = 0.4 kg, Zinc = 1.4 kg, Copper = 1.8 kg

Explanation:

Nickel: 2x

Zinc: 7x

Copper: 9x

Total: 3.6 kg

Nickel + Zinc + Copper = Total

2x + 7x + 9x = 3.6

18x = 3.6

`(18x)/(18) = (3.6)/(18)`

x = 0.2

Nickel: 2x = 2(0.2) = 0.4

Zinc: 7x = 7(0.2) = 1.4

Copper: 9x = 9(0.2) = 1.8