a father is 5 times as faster as son in doing a work. Father completes a particular work in 40 days before son.If both of them work together in how many days can they complete the work?  Pick
A) 8.33days B) 9.33days C) 10.33days D) 7.33days E) 6.33days
f=5*s   f(t-40)=w=s*t   5*s*(t-40)=s*t   5t-t=200   t=50   father takes 10 day   son takes 50 days   together=50/6=8.33days   8.33daysNSWER:8.33days
<result>A</result>
a father is 5 times as faster as son in doing a work. Father completes a particular work in 40 days before son.If both of them work together in how many days can they complete the work?