Question

if a:b=5:7 and b:c=5:4 then a:b:c=?​

Answer 1

Answer:

if a:b=5:7 and b:c=5:4 then a:b:c= 25:35:20

Answer 2

Answer:

5:7

Step-by-step explanation:

A:B=5:7

Let A be 5k and B be 7k.

B:C=5:4

Let B be 5x and C be 4x

7k=5x

x=7k/5

A:B:C=5k:5x:4x=5k:4x:7(7k/5)=

25k:25x:20x=25:25:20

Hence A:B:C=15:20:28