A ferry leaves a harbor & travels to a resort island at the speed of 18 mph. On the return trip the ferry travels at the speed of 14 mph. The total time is 4 h. How far is the island from the harbor?

Answer 1

x = 14t = 18(4-t) where x is the distance

14t = 72 - 18t

32t = 72

t = 72/32 = 36/16 = 18/8 = 9/4

14*9/4 = 31.5

18 * (4-9/4) = 31.5