Question

if A:B =3:4,B:C=5:7 , find A:B:C​

Answer 1

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$A:B =3:4 = 15:20$

$B:C=5:7 = 20:28$

So

$A:B:C = 15 : 20: 28$

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Answer 2

Answer:

3:20:7

Step-by-step explanation:

3/4 : 5/7

Making B equal on both sides

= 3:20:20:7

= 3:20:7