A n B can do a work together in 5 days.if A double his speed and B half his speed then they can do it in 4 days.How many days taken if A alone do this work?

• 1/a+1/b=1/5
  now,acc to the quest,a double his speed and b half his speed
  therefore,it can be written as
  2/a+1/2b=1/4
  on solving these 2 eq,we get A=10
• 12 years agoHelpfull: Yes(55) No(0)
• (A=1)+(B=4)==5.... (2A)+ (1/2*B)==4 A alone == 25 days
• 12 years agoHelpfull: Yes(0) No(11)
• 1/a+1/b=1/5
  now,acc to the quest,a double his speed and b half his speed
  therefore,it can be written as
  2/a+1/2b=1/4
  on solving these 2 eq,we get A=10
• 12 years agoHelpfull: Yes(0) No(5)
• let one day work be a and b
  a+b=1/5
  2a+b/2=1/4
  solving a=1/10
  answ is 10 days
• 12 years agoHelpfull: Yes(0) No(0)