1. There are two water tanks A an B, A is much smaller than B. While water fills at the rate of 1 liter every hour in A, it gets filled up like. 10, 20, 30, 40, 80, 160, ….in tank B. (At the end of first hour, B has 10 liters, second hour it has 20 liters and so no). If tank B is 1/32 filled of the 21 hours, what is total duration of hours required to fill it completely? a) 26 b) 25 c) 5 d) 27

• a)26 hours
  Each hour, tank B has filled up like double as 10,20,40......so on
  So, by reducing the filled rate of the tank B by half for every hour, we solved it.
  So, if Tank B filled 1/32th of tank in 21 hours means,
  
  1/16 should be filled in the time of 22hours
  1/8 of the tank has been filled in 23hours
  1/4 of tank B has been filled in 24 hours
  1/2 of tank B filled in 25 hours
  And finally,
  tank B filled totally in 26 hours.
• 12 years agoHelpfull: Yes(4) No(0)
• a) 26
  1/32 - 21->1/16 - 22........->1/2-25->26
  
• 12 years agoHelpfull: Yes(3) No(1)