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If 4 workers can finish a job in 8 days how man... - JSS3 Mathematics Whole Numbers II Question

If 4 workers can finish a job in 8 days, how many days will it take for 8 workers to finish the same job?

Using inverse proportion: 

4×8=8×𝑑,

so 𝑑=32/8= 4 days.

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