1.Three men do a job in 8 days. How long will 4 men take to finish the job?
Solution( By Unitary Method) :
Here we have to find out days. Therefore we will keep the days at right side in the statement.
∵ 3 men complete the job in 8 days
∴ 1 men complete the job in 3×8 days.
( explanation: one man will take longer to complete the same job, therefore for more days multiplication has been done.)
∴ 4 men complete the job in (3×8)/4
explanation: 4 men will take lesser time to complete the same job in comparison to 1 man, therefore for less days division by 4 has been done.
= 24/4 ,
= 6 days Ans.