If 12 men can reap 120 acres of land in 36 days, how many acres of land can 54 men reap in 54 days?

$12 men120 acres36 days54 men?54 days$

 As 12 men can reap 120 acres, 54 men will be able to reap more acres in 36 days, 120 acres of land was reaped, so in 54 days, more land will be reaped.

Thus, the numbers of acres that can be reaped by 54 men in 54 days =  $\frac{54}{12}x120x\frac{54}{36}$ = 810 acres