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A group of 5 people can do a piece of work in 6 hours. Calculate the time a group of 8 people, working at half the rate of the first group could take to complete the same work.

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 People  Rate  Time Taken  Workdone 
    5   1      6    30
    8   ½      y    30

8 × ½ × y= 30
4y = 30 (divide by 4)
Y = 30/4= 7.5 hours

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