<p>in quadrilateral abcd above, if cd=6, bc=8, and ab=5, what is the length of ad? (Kaplan practice test 3 number 11, page 201)
A. 4
B. 3 root 5
C. 5 root 3
D. 10
E. 15
My solution was 5/6=x/8 so I got x=6.666666… Therefore the answer should be 3 root 5,BUT the answer is 5root3! Can someone please explain me why? Thank you so much…!</p>
<p>Can you post the image?</p>
<p>Solving Kaplan questions is not an efficient use of your time. You’d be better off using real college board questions.</p>
<p>You will probably get a faster response if you post an image/link to the question; we cannot solve it as it is, and most of us do not have that book.</p>
<p>Also CHD2013 is right; from what I’ve seen, the quality of Kaplan test problems has generally been quite poor.</p>