Question

if A:B=3:4, B:C=5:7 find A:B:C​

Answer 1

Answer:

A:B=3:4

Let A be 3k and B be 4k.

B:C=5:7

Let B be 5x and C be 7x

4k=5x

x=

5

4k

A:B:C=3k:4k:7x=3k:4k:7(

5

4k

)=15k:20k:28k=15:20:28

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

Step-by-step explanation:

hope it helps you sis......