3A = 4B = 5C, A : B : C = ?	Select:
A) 12:15:22  B) 20:15:12  C) 15:20:12  D) 12:20:15  E) None of these
Explanation :   Solution: 3A = 420:15:12 = 5C,   A : 20:15:12 : C = 1/3 : 1/4 : 1/5   =&gt; 20/60 : 15/60 : 12/60 = 20 : 15 : 12   Answer : 20:15:12
<result>B</result>
3A = 4B = 5C, A : B : C = ?