Question

answer with step by step explanation first write it in copy and then take the photo and then send..... please send the answer fast with photo.....​

Answer 1

The ratio is

$13 \ratio \: 7 \ratio \: 5$

Let the ratio be 13x,7x and 5x

total composition

=25x

$\%comp \: of \: cu = \frac{13x}{25x} \times 100 \\ = 13 \times 4 = 52\%$

$\%comp \: of \: zinc = \frac{7x}{ 25x} \times 100 \\ = 7 \times 4 = 28\%$

$\%comp \: of \: nickel = \frac{5x}{25x} \times 100 \\ = 5 \times 4 = 20\%$

$\%composition \\ cu = 52\% \\ zinc = 28\% \\ nickel = 20\%$