If two-third of a bucket is filled in 100 seconds then the time taken to fill the bucket completely will be .  Select:
A) 90 seconds  B) 150 seconds  C) 60 seconds  D) 100 seconds  E) 120 seconds

Rationale: 2 / 3 filled in 100 seconds 1 / 3 filled in 50 secs then 2 / 3 + 1 / 3 = 100 + 50 seconds = 150 seconds answer : b
Answer: B