a cruise ship left the Bahamas two hours before a speedboat. The boats traveled in opposite directions. The speedboat traveled at 25 mph for two hours. After this amount of time, the vessels were 90 miles apart. Find the cruise ship's speed. Help!!!!? Whats the cruise ships speed???

Question

mathmale · Answer

Would we assume that the cruise ship continues sailing the whole time, so that the cruise ship has been on the go for 4 hours when the speedboat has been underway for 2 hours?  If our assumption is wrong, this makes a difference in the result we'll obtain.