Water is filled in a container in such a manner that its volume doubles after every five minutes. If it takes 30 minutes for the container to be full, in how much time will it be one-fourth full?

1) 7 mins
2) 10 mins
3) 20 mins
4) 25 mins
5) none of these

• Ans- 20 minutes
  
  At 25 minutes it would have been half
  So, at 20 minutes it would have been one-forth.
• 7 years agoHelpfull: Yes(0) No(0)