A secret can be told only to 2 persons in 5 minutes .the same person tells to 2 more persons and so on . How long will take to tell it to 768 persons ?
a) 47.5 min b)50 min c) 500 min d)49 min

• By trail n error method,I found it to be 47.5 Min..!!!
• 13 years agoHelpfull: Yes(24) No(5)
• Ans is opt (b) 50 min.
  1->2->4->8->16......->512->1024
  2^9=512 After this definitely one person need 5 min to tell to others. So totally 10 * 5 min =50 min
• 13 years agoHelpfull: Yes(12) No(6)
• Can u expln trail n error method??
• 13 years agoHelpfull: Yes(4) No(3)