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Question

If 20 men can finish a job in 48 hours, how many men will be required to do the same job in 30 hours?
(2 marks)

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Solution

As the number of men increases, the time required to finish the job decreases.

Men×time=constant

(0.5 mark)

Let "m" be the number of men required.

20×48=m×30

(1 mark)

m=32

So, 32 men are required to finish the job in 30 hours.

(0.5 mark)

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