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Posted by **Amanda** on Tuesday, March 1, 2011 at 12:41pm.

suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

- Physics -
**bobpursley**, Tuesday, March 1, 2011 at 1:42pmlet M be the cool water, m be the boiling water.

Mc(45-20)+mc((45-100)=0

where M+m=4

M(25)+(4-M)(-55)=0 solve

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