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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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asked Aug 27, 2021 in Mathematics Form 1 by anony mous

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.

ratio rates and proportions
direct and inverse proportion

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answered Aug 27, 2021 by anony mous

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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