Mathematics, 09.07.2019 05:00 sanago4785

Playing tennis burns energy at a rate of about 25 kj/min. cycling burns energy at about 35kj/min. hans exercised by playing tennis and then cycling. he exercised for 50 min altogether and used a total of 1450kj of energy. for how long did he play tennis?

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Playing tennis burns energy at a rate of about 25 kj/min. cycling burns energy at about 35kj/min. ha...

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