A problem by Aaraiz Masood

Level pending

a contractor agrees to lay a road 3000 m long in 30 days.he employs 50 men who work for 8 hours a day.after 20 working days, he finds that only 1200 m of the road is completed.how many more men are to be employed to finish the work on time if each man now works 10 hours a day ?

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