Every bacteria cell divides in 1 min and it take half an hour to fill the cup. How much time it will take to fill half the cup?

The question is incomplete and the answer can’t be processed.

A Bacterial cell divides once every minute. It takes one hour to fill a cup. How much time will it take to fill half the cup?
(1) 59 minute
(2) 30 minute
(3) 29 minute
(4) 20 minute

Solution:

b(n) = 2^n

b(60) = 2^60 = 1 cup

1/4 cup = 2^60/4 = 2^58

Time = n = 58 minutes