The answer should be 500 meters every 2.5 minutes :
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To solve for this equation:
1) Take all her times and add them up
2) Take her meters and add them: (2+4+1+3 = 10)
3) For meters add: (250+1,000+350+ 400 = 2,000)
4) Divide all of these numbers by the amount in each: (four)
Answer: 500 every 2.5 mins
There ! <3