<PRE><B>Question 1181170</B>
&lt;br&gt;
The response from the other tutor is rather cryptic; it may not be of much help to a typical student.&lt;br&gt;
We are given this:
AB:BC:CD = (5/2):(4/3):(5/6)&lt;br&gt;
Multiply the given ratios by 6 to clear fractions:&lt;br&gt;
AB:BC:CD = 15:8:5&lt;br&gt;
With that ratio, let the three lengths be 15x, 8x, and 5x.&lt;br&gt;
We are given AB = 30cm, so 15x=30cm, and x=2cm; that makes BD=BC+CD = 8x+5x=13x=26cm.&lt;br&gt;

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