A submarine left the Dania Pier and traveled toward dry rock. Three hours later a cruise ship left traveling at 30 km/h in an effort to catch up to the submarine. After traveling for six hours the cruise ship finally caught up. What was the submarine's average speed?
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Answer:
20mph
Step-by-step explanation:
Speed=Distance/Time
Distance=Speed*Time
The container ship had been traveling for 12 hours before the aircraft carrier caught up to it.
The aircraft covered the same distance as the container ship in 8 hours at a rate of 30 mph.
Speed*12hours = 30mph*8hours
12hrs*(Speed) = 240 miles
Speed = 240miles÷12hours
Speed = 20mph
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