query: How far can a radio station broadcast?
passage: FM broadcasting
VHF Radio waves do not travel far beyond the visual horizon, so reception distances for FM stations are usually limited to 30–40miles (50–65km) They can also be blocked by hills or buildings.
passage: KDCR
KDCR broadcasts only Christian oriented programming. In 1968, KDCR began broadcasting at 48,000 watts and to a radius of 50–60 miles. Today the station broadcasts at 100,000 watts and to a radius of 80–90 miles. KDCR also operates translator stations—retransmitting KDCR's signal even further in specific areas. Originally KDCR broadcast at 91.3 FM but since 1981 it has broadcast at 88.5 FM.