CAT Exam 2021 Slot 2 Solved Paper

liters is drawn every times.Let initial volume be V, final be F for milk,
The formula is given by : F=V,(1−

k

V

)n n is the number of times the milk is drawn and replaced.
So we get F=V(1−

k

V

)2
Here K=9
We get

16

25

V=V(1−

9

V

)2
We get 1−

9

V

=

4

5

‌or‌

4

5

V=5, but this is not possible because 9 liters is drawn every time.
Hence : 1−

9

V

=

4

5

,V=45‌liters