Vrijeme: 02:07

Put pod noge | On My Way #2

Hrvatski kralj Zvonimir najviše voli vrijeme provoditi u lovu. Iz svog dvorca krenuo je prema šumi udaljenoj 9 km. Prvi dio puta hodao je uzbrdo, zatim po ravnome terenu i naposljetku nizbrdo. Čim je stigao do šume, primijetio je kako se približavaju olujni oblaci i brže-bolje krenuo natrag prema dvorcu. Srećom, uspio se vratiti prije nevremena. Ukupno je put do šume i natrag prošao za 3 sata i 41 minutu. Ako je brzina kralja Zvonimira pri usponu bila 4 km/h, na ravnome 5 km/h i nizbrdo 6 km/h, koliko je, u kilometrima, dug put po ravnome terenu?
King Zvonimir of Croatia is very passionate about hunting. He set off from his castle towards a forest 9 km away. First part of the way he walked uphill, then on flat terrain and lastly downhill. As soon as he reached the forest, he noticed storm clouds approaching and wasted no time returning to his castle. Luckily, he managed to get back before the thunderstorm. His journey to the forest and back lasted exactly 3 hours and 41 minutes. If King Zvonimir's speed uphill was 4 km/h, on flat terrain 5 km/h and downhill 6 km/h, how many kilometres did he walk on flat terrain on the way from his castle to the forest?