Question

6. If A:B = 5:7 and B:C = 6:11, then A:B:C = ?
(a) 30 : 42 : 55
(b) 30 : 42 : 77
(c) 35 : 49: 66
(d) none of these

Answer 1

✴ Answer:

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

⇒ a=5/7 b and c=11/6 b

Taking b=6×7=42, we get

a=5×6=30,c=11×7=77

Hence, A:B:C=30:42:77

option (b) is the answer