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If it takes blanche 36 minutes to walk 2 miles, how long will it take her to walk 7 miles

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if she walks 2 miles in 36 minutes, that means she walks one mile in 18 minutes. therefore she would take 7*18 minutes to walk seven miles. it would take her 128 minutes or 2 hours and 8 minutes to walk seven miles. 
User Linshuizhaoying
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