2. if 20 men can complete a job in 4 days. How many men will be required to finish the work in 40 days?

Solution:

Solution:

Suppose x men will be required to complete the job in 40 days

∵ To complete a job in 4 days the required men are 20 .

∴ To complete the job in 1 day the required men are 20×4 . |
( explanation: in 1 day more men will be needed to complete the same job, therefore for more men multiplication has been done.) |

∴ To complete the job in 40 days the required men are (20×4)/40 . |
explanation:lesser number of men will be needed to complete the job in 40 days in comparison to one day. Therefore division has been by 40 |

= 80/40 = 2 men Ans. |