There are two water tanks A and B, A is much smaller than B. While water fills at the rate of one litre every hour in A, it gets filled up like 10, 20, 40, 80, 160... in tank B.( At the end of first hour, B has 10 litres , second hour it has 20, and so on). If tank B is 1/32 filled after 21 hours, what is the total duration required to fill it completely?

a) 26 hrs (b) 25 hrs (c) 5 hrs (d) 27 hrs

• Here the tank B is considered.. Its capacity is doubling after each hour(10,20,40,80,160,....).If it gets filled 1/32 after 21 hrs, then it will be
  1/16 after 22 hrs and
  1/8 after 23 hrs
  1/4 after 24 hrs
  1/2 after 25 hrs
  and 1 after 26 hrs..
  hence the total duration is 26 hrs
• 14 years agoHelpfull: Yes(76) No(1)
• ans is a)26 hrs
  in 22nd hour it fills 1/16
  in 23rd hour it fills 1/8
  in 24th hour it fills 1/4
  in 25th hour it fills 1/2
  in 26th hour it fills 1
  
• 14 years agoHelpfull: Yes(14) No(2)
• if 1/32 in 21 hrs means then
  1/16 in 22 hrs then
  1/8 in 23 hrs then
  1/4 in 24 hrs then
  1/2 in 25 hrs then
  1/1 in 26 hrs and answer is 26 hrs
• 14 years agoHelpfull: Yes(5) No(0)
• my dear friend ur asked questions are already solved in prev asked sections just look it .. get verrified
• 14 years agoHelpfull: Yes(1) No(5)
• 26 hr. At the end of first hour, B has 10 litres , second hour it has 20, and so on). If tank B is 1/32 filled after 21 hours, then 1/16 in the next hr i.e 22, 1/8 in 23, 1/4 in 24, 1/2 in 25 and 1( fully ) in 26 hours.
• 14 years agoHelpfull: Yes(1) No(1)
• 5+21=26
  ans is 26
• 14 years agoHelpfull: Yes(1) No(4)
• 1/32 filled = 21 hours
  1/16 = 22
  1/8 =23
  1/4 =24
  1/2 =25
  1 =26 hours
  
  it will take 26 hours take to completely filled
• 9 years agoHelpfull: Yes(1) No(0)
• 1/32th in 21
  1/16 in 22
  .
  .
  .
  . 25hr
• 14 years agoHelpfull: Yes(0) No(20)
• 1/2^5=32
  5+21=26
  
• 9 years agoHelpfull: Yes(0) No(0)