Question

plzz give me Answer of this question. if a :b =3:5 and b:c=7:9 find a:b:c

Answer 1

a : b : b

b' : b' : c *

Now multiply the numbers in the columns like this —

ab' : bb': bc

So in this way, the answer to the question is 5*4 : 9*4 : 9*7 = 20:36:63