In the trapezium `ABCD`, `AB||DC` and the two points `P` and `Q` are situated on the sides `AD`
Channel: Doubtnut
Date: 2020-05-09

In the trapezium `ABCD`, `AB||DC` and the two points `P` and `Q` are situated on the sides `AD` and `BC` in such a way that `PQ||DC` , if `PD=18cm`, `BQ=35cm`, `QC=15cm`, then the length of `AD` is.