Question

If a:b=c:d=e:f=1:2, then (3a+5c+7e):(3b+5d+7f)=?

Answer 1

Answer:

1:2

Step-by-step explanation:

a/B = C/d = e/f = 1/2

:- 3a/3b = 5c/5d = 7e/7f = 1/2

:- 3a+5c+7e/3b+5d+7f = 1/2 = 1:2

Hence the right answer is

1:2