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14-03-2016
Mathematics

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in a fireplace, about 3/4 of an 18-inch log will burn in 1/3 of an hour. How many hours will it take to burn 2 1/2 logs?

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15-03-2016

3/4 =1/3 hour
how long to burn 2 and 1/2

3/4=1/3hour
1/4=1/9 hour
4/4=1=4/9hour
1/2=2/4
1/2=2/9hour

2 and 1/2=1+1+1/2=4/9+4/9+2/9=10/9=9/9+1/9=1+1/9=1 and 1/9

answer is C. 1 and 1/9 hour

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