P, Q and R can do a work in 20, 30 and 60 days respectively. How many days does it need to complete the work if P does the work and he is assisted by Q and R on every third day?

Options
1) 10 days
2) 14 days
3) 15 days
4) 9 days

• p's one day work=1/20 so p's 2 day work=1/10
  P+q+r together in one day=1/10
  so
  in 3 days total work done is=(1/10+1/10)=1/5
  so total days needed= 3*5=15 days
  
• 9 years agoHelpfull: Yes(19) No(2)
• P=>20 days Q=>30 days R=>60days
  2days work of p=2/20=1/10
  3rd day work=1/20+1/30+1/60=1/10
  1/5 work cmplted in 3 days
  then cmplt wrk in
  15 days
• 9 years agoHelpfull: Yes(7) No(0)
• Let the total unit of work to be done = 60 units
  So P does 3 units in a day
  Q does 2 units in a day
  R does 1 unit in a day
  So two days of P's work = 6 units and One day of P Q R together work = 6 units
  So in three days they do total 12 units of work
  So 60 units of work will be done in 3*5= 15 days Ans 3)
• 9 years agoHelpfull: Yes(6) No(1)
• 15 days
  p+q+r in one day 1/10
  p in one day 1/2o
  in 2 days 1/10
  s0 1/10+1/10+1/10...........=15 days
• 9 years agoHelpfull: Yes(3) No(0)
• 15 days
  P can do work in 2 days= (1/10)
  P,Q,R together can do work in 1 days =(1/10)
  hence 15 days require to complete work
• 9 years agoHelpfull: Yes(2) No(3)
• work done by p in 1 day=5%
  work done by q in 1 day= 3.33%
  work done by r in 1 day = 1.67%
  now after three days the completed work is = 15% +(3.67+1.67)% = 20%
  for completion of work it takes = 3*5 = 15 days
• 9 years agoHelpfull: Yes(2) No(0)
• Ans . A 815 ,lek in laga nhi elitmus ka Hoga ye question
• 9 years agoHelpfull: Yes(1) No(1)
• let me do in chocolate method
  p-20 days
  q-30 days
  r-60 days
  LCM of these 3 is 60 chocolates
  p-3 choc/day
  q-2choc/day
  r-1choc/day
  total work for 3 days =3+3+(3+2+1)=12 choc/3days
  therefore , 12 chocolates completed-3 days
  60 chocolates=(60*3)/12=15 days.
  so option 3 is right
  
  so, P-60/20=3choc/day
• 8 years agoHelpfull: Yes(1) No(0)
• 1. 10 days
• 9 years agoHelpfull: Yes(0) No(8)
• total unit=60
  1st day=3 unit,
  2nd day=3 unit
  3 day=6 unit
  total=3+3+6=12unit on 3 days
  s0 12*5unit=3*5 days
  answer will be 15 days
• 9 years agoHelpfull: Yes(0) No(0)