Police Radio Problem

State police radios can transmit up to 25 miles. Officer Jacob patrols Highway 20 which runs straight north from the state police post to Driftwood, which is located 50 miles from the police post. Officer Kelley patrols Highway 45, which runs straight west from the police post to the state line, 50 miles west of the police post. If calls cannot be relayed through the police post, what is the maximum combined distance from each Officer to the police post in which the officers can maintain communication? 
Drag points K along the highway and observe its effect on J and the total combined distance from K and J to the Police Post