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Q.

If a bacterial cell divides once in every minute, it takes one hour to fill a cup. How much time will it take to fill half of the cup ?

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a

30 min

b

58 min

c

59 min

d

15 min

answer is B.

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Detailed Solution

If the life cycle of a bacteria is 1 minute, it means that the  bacterial cells divide every 60 seconds. So if it takes 60 minutes to fill a cup, it must take 59 minutes to fill half a cup as in 1 minute half cup full of bacteria will double to fill the cup completely.

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If a bacterial cell divides once in every minute, it takes one hour to fill a cup. How much time will it take to fill half of the cup ?