Question

1. A contractor estimates that 3 persons could rewire Jasminder's house in 4 days. If he uses
4 persons instead of three, how long should they take to complete the job?​

Answer 1

If there will be more person, it will take more days to rewire Jasminder's house.

Therefore it is indirect variation.

We know in indirect variation

xy = k (constant)

So

3×4 = 4×y

12 = 4y

$\frac{12}{4 } = y$

3 = y

It will take 3 days to rewire Jasminder's house.