A runner ran tow laps around a 400m track. she completed the first lap in 50 seconds and then decreased her speed by 5% for the second lap. find:
1 answer:
Answer:
Step-by-step explanation:
Her average speed for the first lap is 8m per second. Her speed for the second lap is about 7.6m per second. So her total time for the two laps is 1 minute and 42 seconds.
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