Bunuel wrote:

Did it take a certain ship less than 3 hours to travel 9 kilometers? (1 kilometer = 1,000 meters)

(1) The ship's average speed over the 9 kilometers was greater than 55 meters per minute.

(2) The ship's average speed over the 9 kilometers was less than 60 meters per minute.

Kudos for a correct solution.

Question : Did it take a certain ship less than 3 hours to travel 9 kilometers?

Speed = Distance / Time = 9/3 = 3 km per hour

Question REDEFINED: Is the Speed of certain Ship less than 3 km per hour?Statement 1: The ship's average speed over the 9 kilometers was greater than 55 meters per minute.i.e Average Speed of Ship > 55 meters per min

i.e. Average Speed of Ship > (55/1000) / (1/60)

i.e. Average Speed of Ship > 55*60 / 1000 Km per hour

i.e. Average Speed of Ship > 3.3 Km per Hour

hence,

SUFFICIENTStatement 2: The ship's average speed over the 9 kilometers was less than 60 meters per minute.i.e Average Speed of Ship < 60 meters per min

i.e. Average Speed of Ship < (60/1000) / (1/60)

i.e. Average Speed of Ship < 60*60 / 1000 Km per hour

i.e. Average Speed of Ship < 3.6 Km per Hour

i.e. Average speed could be greater than or less than 3 km per hour

hence,

NOT SUFFICIENTAnswer: Option

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