Question

The ratio of copper and zinc in an alloy is 9:7. If the weight of zinc is 9.8 kgs what is the weight of copper in the alloy?

Answer 1

Answer:

12.6

Step-by-step explanation:

As the ratio is 9:7 and weight of zinc = 9.8 kgs

9/7=x/9.8

9*9.8=7x

88.2= 7x

x= 88.2/7

x= 12.6

Hence weight of copper= 12.6 kgs

Answer 2

Answer:

12.6 kg

Step-by-step explanation:

7x=9.8

x=9.8/7

x=1.4

so multiply 9 by 1.4

=9×1.4

=12.6

so weight of copper is 12.6 kg