Question

if A:B=3:5 and B:C= 7:9 , then , find the value of A:C
1)21:35
2)21:45
3)21:55
4)21:65​

Answer 1

It's answer is 2) 21:45

Answer 2

Answer:

21:45

Step-by-step explanation:

A:B=3/5 ,B:C=7:9

A/B=3/5 and B/C=7/9

B=7C/9

A/7C/9=3/5

9A/7C=3/5

A/C=3*7/5*9

A/C=21/45