Some work is done by two people in 24 minutes. One of them can do this work alone in 40 minutes. How much time does the second person take to do the same work ?

• Ans : 60 Minutes
  let A and B be 2 persons doing the work
  (A+B) 's work = A's + B's >> 1/24 =1/40 +1/B
  (1/24)-(1/40) = 2/120 =1/60
  Hence B can do work in 60 min
• 13 years agoHelpfull: Yes(6) No(1)
• 1 day work=1/24
  A's 1 day work=1/40
  b's 1 day work =1/24-1/40
• 13 years agoHelpfull: Yes(4) No(1)
• Let t = time for 2nd person to do the job
  
  Let the completed job = 1
  
  A shared work equation,
  24/40 + 24/t = 1
  3/5 + 24/t = 1
  
  after solving the equation,
  t = 60 min alone
• 5 years agoHelpfull: Yes(0) No(0)