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05 Feb 2004, 04:12
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Please show me the right way to do this.
A container contained 80Kg of milk. from this container 8Kg of milk was taken and replaced by water. the process of taking out 8kg of liquid was repeated 2 times. How much milk is now there in the vessel.
A. 54
B. 56
C. 58.32
D. 53.18
E. I m not that smart.....
A container contained 80Kg of milk. from this container 8Kg of milk was taken and replaced by water. the process of taking out 8kg of liquid was repeated 2 times. How much milk is now there in the vessel.
A. 54
B. 56
C. 58.32
D. 53.18
E. I m not that smart.....
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05 Feb 2004, 04:42
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mdfrahim
Please show me the right way to do this.
A container contained 80Kg of milk. from this container 8Kg of milk was taken and replaced by water. the process of taking out 8kg of liquid was repeated 2 times. How much milk is now there in the vessel.
A. 54
B. 56
C. 58.32
D. 53.18
E. I m not that smart.....
A container contained 80Kg of milk. from this container 8Kg of milk was taken and replaced by water. the process of taking out 8kg of liquid was repeated 2 times. How much milk is now there in the vessel.
A. 54
B. 56
C. 58.32
D. 53.18
E. I m not that smart.....
The way to do this is
1) realize that you remove a "solution" and add "water" which creates a new solution of X% milk.
2) everytime you remove 8kg of the solution, keep track of how much of that solution is milk by multiplying 8kg x X%.
repeat.
3) The amount of milk left is 80kg less that amount you removed.
P.S. strickly speaking, we must assume milk and water have same density.
