The third proportional of 1 hour 20 minutes, 1 hour 40 minutes is:
(a) 1 hrs 50 minutes (b) 2 hrs
(c) 2 hrs 5 minutes (d) 2hrs 25 minutes

• 1 hour 20 minutes = 80 minutes
  1 hour 40 minutes = 100 minutes
  Let 3rd proportion be x
  then,
  80/100=100/x
  = 125 minutes
  = 2 hour 5 minutes (c)
• 10 years agoHelpfull: Yes(4) No(1)
• Ans-(c)
  Sol.
  let x min be the third proportion.
  therefore,
  80min/100min=100min/x,
  x=10000min/80min=125 min
  i.e; x=2 hrs 5 minutes....Ans
  
• 10 years agoHelpfull: Yes(0) No(0)
• let x min be the third proportion.
  80min/100min=100min/x,
  x=10000min/80min=125 min
  i.e; x=2 hrs 5 minutes
• 10 years agoHelpfull: Yes(0) No(0)