father and two sons visit grandmother - All-Russian MO 1999 Regional (R4) 8.`
Source:
September 25, 2024
algebracombinatorics
Problem Statement
A father and two sons went to visit their grandmother, who Raya lives km from the city. My father has a motor roller, the speed of which km/h, and with a passenger - km/h (with two passengers on a scooter It’s impossible to move). Each of the brothers walks along the road at a speed of km/h. Prove that all three can get to grandma's in hours