Question

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

Answer 1

9.1 kg

Explanation

Let the Weight of zinc be x

Zinc/copper

7/9*x/11.7

By cross multiplying

7*11.7 = 9*x

81.9 = 9x

x = 81.9/9

x = 9.1

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Answer 2

Answer:

wieght of Zinc = 9.1 kg

Step-by-step explanation:

Given that,

Weight of zinc =7x

Weight of copper =9x

Total weight of alloy

7x+9x=11.7kg

x=1.3 kg

Hence,

Weight of zinc =7×1.3=9.1 kg