If 15 men or 25 women can do a work in 130 hours how long will 20 men and 10 women take to complete the work

• Ans=75 hours
  1 Men, 1Hr work=1/15*130=1/1950,so 20 Men 1 Hr. work= 20/1950= 2/195
  1Woman, 1Hr work=1/25*130=1/3250, so 10 Women 1Hr. work= 10/3250= 1/325
  1 Hr. 20 men & 10 Women work=2/195 + 1/325 =13/975= 1/75
  So Hours to complete the work=1/(1/75)=75
  
• 10 years agoHelpfull: Yes(2) No(0)
• 15*130mh=25*130wh
  3mh=5wh
  1mh=5/3 wh
  (20*5/3 +10)w*time= 25*130 wh
  t= 75 hr
  
• 10 years agoHelpfull: Yes(1) No(0)
• ans=75 hours
• 10 years agoHelpfull: Yes(0) No(0)
• 75
  15*130mh=25*130wh
  3mh=5wh
  1mh=5/3 wh
  (20*5/3 +10)w*time= 25*130 wh
  t= 75 hr
• 10 years agoHelpfull: Yes(0) No(0)
• (1/20/130*15)+(10/130*25)=130*15*25/(20*25)+(10*15)
  130*15*25/650=75
• 7 years agoHelpfull: Yes(0) No(0)