20 men can plant 50 saplings in 8-hours. In how many hours can 15men plant 80
saplings?

• M W(saplings) H
  20 50 8
  15 80 x
  
  (20*80*8)/(15*50)=x
  
  x=17 1/15=17.06
• 8 years agoHelpfull: Yes(4) No(0)
• 17 Hours
  
  20M --------------------- 50 S---------- 8H
  15M=20*3/4M--------50*3/4 S -----8H
  For 50*3/4 saplings,it takes 8 hours, So for 80 saplings=80*8/(50*3/4)=256/15=17.06 ~ 17 hours
• 9 years agoHelpfull: Yes(1) No(0)