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In a triangle ABC, angleBAC = 90^@, AD i...

In a triangle ABC, `angleBAC = 90^@`, AD is the altitude from A on to BC. Draw DE perpendicular to AC and DF perpendicular to AB. Suppose AB =15 and BC = 25. Then the length of EF is

A

12

B

10

C

`5sqrt3`

D

`5sqrt5`

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