Question

$76$ persons complete a job in $42days$. In how many days will $56$ persons do the same job?

Answer 1

Find number of days:

$76$ persons complete a job in $42days$

$1$ person will complete the job in $42\times 76days$ (Less persons, more days required)

$56$ persons will complete the job in $\frac{42\times 76}{56}days=57days$ (More persons, less days required)

Hence, $56$ persons will do the same job in $57days$ .