# Find the value of A:B:C, if

If A:B=5:7 and B:C=6:11, then A:B:C is-

- 30:42:77
- 35:66:78
- 12:17:29
- 35:12:77

**Answer: (a) 30:42:77
Explanation:-**

A:B = 5:7 and B:C = 6:11

**Formula-**

a:b and b:c then, a:b:c = ab:bb:bc

Therefore, A: B: C = 5 x 6: 7 x 6: 7 x 11

= 30:42:77