G wrks 5 times fastr dn hs sn n hence cmptl a job 40 dys earlr dan sn.find d time dy would take 2 fnsh d job togethr

• let G completes the work in x days...
  so his son completes it in 5x days...
  but according to the give data
  5x=x+40
  x=10
  so G takes 10 days and his son takes 5*10=50 days to finish the work
  G's 1 day work=1/10
  his son's 1 day work=1/50
  together work per day=(1/10)+(1/50)
  =6/50=3/25
  so they will take 25/3 (or) 8 1/3 days to complete the work together...
  
• 12 years agoHelpfull: Yes(31) No(0)