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mlstogsdill05
29.10.2019 •
Mathematics
Claire mowed 7 lawns last week. she mowed each lawn in 7/12 hour. she mowed the same lawns this week in 5/12 hour. how many times longer was claires time to mow all the lawns last week than this week?
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Ответ:
14/12 or 1.17hours longer
Step-by-step explanation:
Previous week, Claire mowed 7 lawns
Each lawn was mowed in 7/12 hour
Therefore, all the lawns were mowed in 7/12 × 7 hours = 49/12 hours
This week, Claire mowed 7 lawns
Each lawn was mowed in 5/12 hour
Therefore, all the lawns were mowed in 5/12 × 7 hours = 35/12 hours
To calculate the extra time spent in mowing last week's lawn than this week's, we find the difference between the time spent in mowing all the lawns for the two weeks.
49/12 - 35/12 = 14/12 hours
Therefore, it took Claire 14/12 or 1.17hours longer to mow last week's lawn than this week's.
Ответ: