there are 3 custoners who wants to take a hair cut and shave. there are 2 barbers who takes one quarter of an hour for a hair cut, and 5 minutes for a shave. both the barbers want to finish off and go quickly to their homes. in what time can do it.

• one barber should hair cut 2 customers which is (15+15) minutes.
  other barber should haircut 1 customer and shave 3 customers which takes(15+5+5+5) minutes.
  so both of them can complete their work in 1/2 hour(30 minutes)individually.
• 13 years agoHelpfull: Yes(7) No(3)
• 35mins..
  2 hair cuts simultaneously (15mins)
  2 shaves simultaneously (5mins)
  1 hair cut + 1 shave (15mins)
  
  3 customers cannot take d shave in 15mins because one of them will be taking the hair cut.. so 30mins cannot be the minimum time taken.
• 12 years agoHelpfull: Yes(6) No(3)
• Let us take 3 customers as A,B,C.
  Let us take 2 Barbers as X,Y.
  First X cuts hair for A for 15 min .............................................. (1)
  Alternately Y completes shave for B,C in 10 minutes..........................(2)
  Then completion of shave Y starts Haircut for B or C for 15 minutes...........................(3)
  So Total time upto now for Y is 25 minutes
  After X completion of hair cut to A he starts cutting for B or C..................................(4)
  Lastly A has to be shaved which will be finished by Y for 5 minutes
  
  
  
  So if u See Both Barbers are spending 30 minutes each
• 9 years agoHelpfull: Yes(0) No(0)