Question

If 75 persons can perform a piece of work in 12 days of 10 hours each, how
many persons could perform a piece of work twice as large in half the number of days, working 8
hours daily?​

Answer 1

Days hours. Work. Person

12 10. 1. 75

12/10. 10. 2. ?

The number of persons =

75*12*2*10 *2

___________

1.2*1*10*3

= 1000

As 3 person = 2 men

1 person = 2/3 men{efficiency} .