SOLUTION: A wall of length 40feet is constructed by 10 masons in 5 days. In how many days will 6 masons construct the same wall

Use the worker-time-job formula, which is:



where

W1 = the number of workers in the first situation.
T1 = the number of time units (days in this case) in the first situation.
J1 = the number of jobs in the first situation.

W2 = the number of workers in the second situation.
T2 = the number of time units (days in this case) in the second situation.
J2 = the number of jobs in the second situation.

W1 = 10             W2 = 6
T1 =  5             T2 = the unknown quantity
J1 =  1             J2 = 1

[Notice that there is only 1 job done in both situations]











Edwin