Question

Thirty men take 20 days to complete a job working 3 hours a day how many hours a day should 40 men work to complete the job in 18 days

Answer 1

Answer:

40 men can complete the work In 4.444444444

Answer 2

2.5 hours

Step-by-step explanation:

$30\times20\times3=1800$ man has required to complete the job.

let x number of hours a day to do the same job

$40\times18\times x=1800\\720x=1800\\x=\frac{5}{2}\\=2\frac{1}{2}$

so,2.5 hours a day should 40 men work to complete the job in 18 days.