Question

If 50 men can dig a trench in 60 days, in how many days will 70 men dig the same trench?

Answer 1

50 men ---–---- 60 days
1 man ------------60*50 days
70 men------------ 3000/70 days
=42 days....

Answer 2

If 50 men dug a trench in 60 days,then 70 mens will dug it in less days.
Therefore, it is a case of inverse proportion. ..
let no. of days be Y2

x1=50. y1=60. x2=70. Y2=?

now, x1y1=x2y2
50×60=70× Y2
3000=70×y2
Y2=. 3000÷70
Y2= 42.8 days....
approx 42 days
hope it will help you....