the men are camping 45 miles due west and then go 60 miles directly north. if they can cover 18 miles a day how long will it take them to reach the railroad?

Answer 1

Assuming
(1) they can go straight cross-country
(2) they camped due west of the railroad

then the must travel

√(45^2+60^2) = 15√(3^2+4^2) = 75 miles
so, it will take them 75/18 = 25/6 days