A jar of 10 litres contains 4 litres milk and another of 6 litres is filled completely with water.

M4maths Previous Puzzles

17 Jun 2009 Milk and water

A jar of 10 litres contains 4 litres milk and another of 6 litres is filled completely with water.
6 litre mixtures are removed to second jar after pouring all the water of second jar in first. After
then the process is revised with 4 other jars of 6 litres filled with water completely. What will be
the amount of milk remained in 10 litre jar finally.

OPtion

1) 0.52675
2) 0.01024
3) 0.12500
4) 0.04096
5) 4.00000
6) 0.40000
7) 0.66667
8) 1.50000
9) 0.06400
10) 0.80000

Solution

In every mixing process 4 part of milk is present in 10 part of mixture. Hence for this
process of 5 steps remaining milk in 10 litres jar is
4×(4/10)×(4/10)×(4/10)×(4/10)×(4/10)
=0.04096

Correct Option: 4 Best Solution (1)