Posted by **Rose** on Wednesday, October 15, 2008 at 10:16pm.

if line segment AC=120ft and the ratio of line AB:BC =3/5 - what is the length of line AB ?

I set up the problem up as X:120 & 3:5

3x120= 360 and divided 5 into 360 = 72ft

but the answer in the book is 45ft

help!

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