**Suraj**
Answered On : Mar 6th, 2006

It'll take 29 days to fill half.

Login to rate this answer.

**nithiya devi**
Answered On : Mar 21st, 2006

the answer is 29 days

Login to rate this answer.

**mohan kumar**
Answered On : May 19th, 2006

seven and a half days

Login to rate this answer.

**lohithkschalam**
Answered On : Jul 24th, 2006

IT TAKES 29 DAYS TO FILL ONE HALF OF THE DISH..............

Login to rate this answer.

**Kmalesh malviya**
Answered On : Jul 27th, 2006

Obviosly it will take 29 days ,since on the 30th day it will be doubled and get filled...

1 User has rated as useful.

Login to rate this answer.

In 30th day the bacteria is completely filled in the dish and per day the size is doubled. Hence at 29th day the dish must me half. So the ans is 29 days.Send me some recent wipro placementpapers.

Login to rate this answer.

**raju**
Answered On : Sep 17th, 2006

yes it is 29 days

Login to rate this answer.

**Brijesh Kumar**
Answered On : Apr 7th, 2007

seefirstday -> x

then second day it becomes ->2x

then third days ->4x

ans so on 8x , 16x , 32x then it ll cross 60 , when it has 64 x...

then it takes more than 7 days

Login to rate this answer.

**sushma**
Answered On : Apr 27th, 2007

it takes 7 and a half days to fill the dish

Login to rate this answer.

how come it yakes only 7 day to fill the dish half? Plz can u explain me

Login to rate this answer.

**J T V GUPTA**
Answered On : Jul 1st, 2007

Preethi here is the solution

Suppose a 30kg container will be filled in 30 days by putting 1kg bacteria on each day

On first day 1kg is put into the dish in 30 kgs.

Second day it will be doubled 2+second days 1kg

Third day it will be 6kgs+third day 1kg

Fourth day it will be 14kgs+1kg

Fifth day it will be 30kgs

Login to rate this answer.

**narayanan**
Answered On : Aug 20th, 2007

29 will be the correct answer. We have to go from the bottom. On the 29th day it will be half of the tank since on the 30th day it is filled.

Login to rate this answer.

**carthi1985**
Answered On : Oct 9th, 2007

First day: 1

2nd day: 2+1 (it doubles 1 to 2 and +1 for the day)

3rd day: 6+1 (it doubles 3 to 6 and +1 for the day)

So on..

Login to rate this answer.

29 days to fill half

since the bactria doubles in one day

Login to rate this answer.

1st day 372.529% of bacteria is filled

2nd day 745.05%

by this way on __29th day __50% is filled

and the last day 100% bacteria is filled

Login to rate this answer.

4 days

Login to rate this answer.

1st day it fills 1/30

2nd day it fils 1/30+2/30

3rd day it fills 1/30+2/30+4/30

4th day it fills 1/30+2/30+4/30+8/30=1/2

Login to rate this answer.

**kasthuri**
Answered On : Oct 15th, 2011

Let A1 -> increased area

A-> original area

A1=1.69%(since it is increased by 69%)

A1=s1^2

1.69 S^2=S1^2

S1->increased side

S->original side

therefore taking square root on both sides

1.3 S=S1

therefore s is increased by .3 i.e 30%

Login to rate this answer.