if 5 people under took a piece construction work and finished off the job in 15 days if two people drop out then the job will be completed in
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5 people = 15days
If two people drop out the job : 5-2= 3 people left.
3people = Xdays
It has given us a proportion.
5people = 15days
3people = Xdays
Cross Multiply
15×3 = 5×X
45 = 5X
X = 45/5
X = 9 days
This shows it is an inverse proportion
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