A group of men decided to do a job in 4 days.But since 10 men dropped out everyday,the job is completed at the end of the 7th day.How many were there at the beginning?
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70 over three men were at the beginning of first
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Step-by-step explanation:
Let X be the initial number of men then,
According to the question,
4X = X + (X - 20) + (X - 40) + (X - 60) + (X - 80) + (X - 100) + (X - 120)
⇒ 4X = 7X - 420
⇒ 3X = 420
⇒ X = 420/3
⇒ X = 140 men
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