If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d?
Choose the correct option.
A) 5/12 B) 5/15 C) 5/10 D) 5/11 E) 5/13
a/d = (3/4)*(7/9)*(5/7) =&gt; 5/12   5/12nswer: 5/12
<result>A</result>
If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d?