Question

if A:B=3:4,B:C=5:7,FINDA:B:C​

Answer 1

Answer:

15:20:28

Step-by-step explanation:

A:B=3:4

B:C=5:7

A:B={3:4}×5=15:20

B:C={5:7}×4=20:28

A:B:C=15:20:28

Answer 2

Answer:

A:B:C =12:20:28

Step-by-step explanation:

We have to equalize the value of b

SO

We can also write it as

A/B =3/4 and B/C =5/7

LCM of 4 and 5=20

Now multiply 4 to a number to get 20 and so do with the numerator and denominator of both the fraction