I) A farm employs 30 men working 40 hours a week. When some of the men are ill, the rest have to work 50 hours a week to make up the lost time, how many men are ill?

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6 men are ill.

Step-by-step explanation:

the work of 30 men in 40 hours is the product

30×40

an unknown number of men (x) is sick, and now the remaining workers do the same work in 50 hours

(30-x)×50

so,

30×40 = (30-x)×50

1200 = 1500 - 50x

-300 = -50x

x = 6

12.5 feet

step-by-step explanation: