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ABCD is a square with sides of length 10...

ABCD is a square with sides of length 10 units. OCD is an isosceles triangle with base CD. OC cuts AB at point Q and OD cuts AB at point P. The area of trapezoid PQCD is 80 sq units. The length of altitude from O of the AOPQ (in units) is

A

12

B

13

C

14

D

None of these

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The correct Answer is:
D
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