walls of two buildings on either side of a street are parallel to each other a ladder 25 feet long is placed on the street such th

walls of two buildings on either side of a street are parallel to each other a ladder 25 feet long is placed on the street such that its top just reaches the window of a building at the height of 20 feet . on turning the ladder over to the other side of the street touches the slab of the other buildings at the height of 15 feet . find the breadth of the street​