Question

an alloy contains copper and zinc in the ratio of 2:11.find the weight of copper in yhe the alloy, if it has 28.6 grams of zinc

Answer 1

let the copper be x
2:11 = 28.6 × x
x = 28.6 ×2/11
x = 57.2 / 11
x = 5.2

Answer 2

Answer:

5.2 grams or 5 1/5 grams

Step-by-step explanation:

Let zinc be 11x.

Let copper be 2x.

Therefore 11x= 28.6 grams

Therefore x= 28.6/11= 2.6

Therefore copper= 2.6 x 2 = 5.2 grams or 5 1/5 grams