Question 34853
40*X=60*(4-X) 0R 40X=240-60X OR 100X=240 OR X=2.4 HOURS OUT @ 40KM/H AND 
4-2.4 OR 1.6 HOURS FOR THE RETURN TRIP. THUS THE TOTAL TRIP IS 2.4 HOPURS @ 40 OR 96 KM AND THE RETURN TRIP IS 60*16 OR 96 KM.