Question

7. If 20 persons can do a work in 180 days, then how many persons will be required to complete that work in
40 days?
​

Answer 1

$\huge \red {\underbrace \mathfrak{Answer :}}$

The Answer is 90 persons.

The work is measured in terms of person days

Person days =20×180=3600

Thus 3600 person days are required for the work to be completed.

If the persons available are 40,the days are calculated by dividing the required person days by the number of workers

$= \frac{3600}{40} = 90$