using equation nRTE= W
where n = no of men/women
R = rate
T= time taken
E= Efficiency
W= work
12*26*19*0.9 = 20*T*6*0.6
Solving T gives 39
where n = no of men/women
R = rate
T= time taken
E= Efficiency
W= work
12*26*19*0.9 = 20*T*6*0.6
Solving T gives 39










