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In the trapezium ABCD, AB"||"CD and two ...

In the trapezium ABCD, `AB"||"CD` and two points P and Q are on the sides AD and BC respectively in such a way that `PQ"||"DC`. If `PD=18cm`, BQ =35 cm, QC = 15 cm, then the length of AP will be

A

42 cm

B

60 cm

C

30 cm

D

15 cm

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