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Mathematics, 07.01.2021 02:20 lailalorinda

A group of friends decide to attend a night on a cruise ship. Will last 4 hours. Ship travels upstream 18km and back to starting point. Current is 2km an hour. What is the ships speed and how long was the journey upstream?

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A group of friends decide to attend a night on a cruise ship. Will last 4 hours. Ship travels upstre...

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