Найдите расстояние между двумя городами если 49 этого расстояния на 20 км меньше всЕго расстояния

1880-The first telephone was installed in the House of Representatives lobby.1897-By 1897 the expanding telephone system required a larger switchboard and a fulltime operator.47-Harriet Daly was the head switchboard operator at the Capitol for 47 years.  30,000-the Capitol switchboard office handles in excess of 30,000 calls per week1947- a weekday radio series detailing the significant proceedings of the House and Senate “Congress Today” was first aired.1980s-internal e-mail came into being1994-the House of Representatives launched its first Web site

1)9-4=5(частей) - составляют 20 км2)20/5=4(км) - на 1 часть.3)4*4=16(км) - 4/9 пути.4)16+20=36 (км) - всё расстояниеОтвет:36 км