英语翻译who is walking down the hill at a rate of 1m／s.David con
英语翻译
who is walking down the hill at a rate of 1m／s.David continues up the hill for another 7km before riding down at double the speed he rode up.David and Bob arrive at David＇s starting piont at the same moment.In meter per secend,what was David＇s speed down the hill?
当然翻译了并做出了这道题更好.
who is walking down the hill at a rate of 1m／s.David continues up the hill for another 7km before riding down at double the speed he rode up.David and Bob arrive at David＇s starting piont at the same moment.In meter per secend,what was David＇s speed down the hill?
当然翻译了并做出了这道题更好.
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