If 20 men can finish a job in 48 hours, how many men will be required to do the same job in 30 hours
32
As the number of men increases, the time required to finish the job decreases.
Men×time=constant
Let "m" be the number of men required.
20×48=m×30
m=32
So, 32 men are required to finish the job in 30 hours.