Question

The ratio of zinc and copper in an alloy is 9:8. If the weight of copper, in the same alloy, is 120 kg, find the weight of zinc in the alloy.

• A. 120 kg
• B. 156 kg
• C. 162 kg
• D. 135 kg

Answer 1

The correct option is D 135 kg

If, x is the weight of zinc

9 : 8 = x : 120 ​

$\frac{9}{8}=\frac{x}{120}$

$8x=9\times 120$

$x=\frac{(9\times 120)}{8}=135kg$

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