Question 1184871
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(1) Given: 9 men, 15 days, 18 machines assembled.<br>
(2) 20 men instead of 9
The number of men increases by a factor of 20/9; the amount of time required decreases by a factor of 20/9
15/(20/9)=15*(9/20)=135/20=27/4
20 men, 27/4 days, 18 machines<br>
(3) 60 machines instead of 18
The number of machines to be assembled increases by a factor of 60/18=10/3; the amount of time required increases by that same factor
(27/4)*(10/3)=270/12=45/2
20 men, 45/2 days, 60 machines<br>
ANSWER: 45/2 days, or 22.5 days, for 20 men to assemble 60 machines<br>