The ratio of zinc and copper in an alloy is 7:9. if the weight of copper in the alloy is 11.7 kg, find the weight of zinc in alloy?

11.7 × 7/9

=9.1 kg

The ratio of zinc and copper in an alloy is 7:9. If the weight of copper in the alloy in the alloy is 11.7 kg. Find the weight of zinc in it

zinc : copper = 7:9

zinc/11.7 = 7/9
zinc = 11.7(7/9) = ....

To find the weight of zinc in the alloy, we can use the ratio given and the weight of copper.

The ratio of zinc to copper is given as 7:9, which means that for every 7 parts of zinc, there are 9 parts of copper.

We are given that the weight of copper in the alloy is 11.7 kg. Since the ratio is in parts, we need to find the weight of zinc in the same parts.

To do this, we can set up a proportion:

Zinc weight / Copper weight = Zinc ratio / Copper ratio

Let's substitute the values we know:

Zinc weight / 11.7 kg = 7/9

To find Zinc weight, we can cross multiply:

Zinc weight = (11.7 kg) * (7/9)

Zinc weight = 91/9 * 11.7 kg

Zinc weight = 10 * 11.7 kg

Zinc weight = 117 kg

Therefore, the weight of zinc in the alloy is 117 kg.