Question 10.1 .
Two persons could fit new windows in a house in 3 days.
One of the persons fell ill before the work started. How long would the job take now?
Let the number of days be x.
Here, the number of persons and the number of days are in inverse proportion.
∴ 21=x3⇒ x×1=2×3⇒ x=2×31=6 days