Question

the ratio of zinc and copper in an alloy is 7:9 if the weight of copper in alloy is 12.6 kg,find the weight of zinc in it ​

Answer 1

Answer:

Given that,

Weight of zinc = 7x

7xWeight of copper = 9x

9xTotal weight of alloy =

7x + 9x = 11.7kg

x = 1.3 kg

Hence,

Weight of zinc = 7 × 1.3 = 9.1 kg

Answer 2

Answer:

• Weight of zinc in alloy is 9.8 kg.

Step-by-step explanation:

Given:

• The ratio of zinc and copper in an alloy is 7:9.
• Weight of copper in alloy is 12.6 kg

To Find:

• Weight of zinc in alloy.

Solution:

Let the weight of zinc in alloy be 7x

and weight of copper be 9x

Weight of copper in alloy = 12.6 kg

➛ 9x = 12.6

➛ x = 12.6/9

➛ x = 1.4 kg

Now,

Weight of zinc = 7x

Weight of zinc = 7 × 1.4 = 9.8 kg.

Hence,

• Weight of zinc in alloy is 9.8 kg.