英语翻译A boat moves through the water of a river at9.77 m/s relative to the water,regardless ofthe boat’s direction.If the current is flowing at 7.97 m/s,howlong does it take the boat to complete a tripconsisting of a 235 m displacement down-s

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英语翻译A boat moves through the water of a river at9.77 m/s relative to the water,regardless ofthe boat’s direction.If the current is flowing at 7.97 m/s,howlong does it take the boat to complete a tripconsisting of a 235 m displacement down-s

英语翻译A boat moves through the water of a river at9.77 m/s relative to the water,regardless ofthe boat’s direction.If the current is flowing at 7.97 m/s,howlong does it take the boat to complete a tripconsisting of a 235 m displacement down-s
英语翻译
A boat moves through the water of a river at
9.77 m/s relative to the water,regardless of
the boat’s direction.
If the current is flowing at 7.97 m/s,how
long does it take the boat to complete a trip
consisting of a 235 m displacement down-
stream followed by a 355 m displacement up-
stream?
Answer in units of s.如题

英语翻译A boat moves through the water of a river at9.77 m/s relative to the water,regardless ofthe boat’s direction.If the current is flowing at 7.97 m/s,howlong does it take the boat to complete a tripconsisting of a 235 m displacement down-s
一艘船在河里相对于水的运行速度是9.77米/秒,方向不计.如果目前水流速度是7.97米/秒.问船先向下游运行235米,在向上游运行355米,总共需要多长时间?