An alloy is made of copper and iron by weight. 42% of it is copper and the rest is iron. If the alloy weights 55 kg, find the we

Question

3 years ago

15

ight of copper and iron

2 answers:

faltersainse [42] · Answer 1 · 2022-04-17T08:34:13+03:00

7 0

Answer:

percent of iron in alloy= 100-42 = 58%

weight of the iron = 55×58÷100= 31.9

weight of iron= 31.9 kg

weight of copper= 55-31.9=23.1

weight of copper = 23.1

Step-by-step explanation:

[ I'm not sure but I think this is right ]

Anastasy [175] · Answer 2 · 2022-04-17T10:07:38+03:00

Answer: copper = 23.1 kg

iron = 31.9 kg

Step-by-step explanation:

copper = 42% of 55

= 42/100 * 55

= 42/20 * 11

= 21/10 * 11

= 231/10

= 23.1 kg

so iron = 100% - 42%

= 58%

so

58% of 55

= 58/100 * 55

= 58/20 * 11

=31.9 kg