SOLUTION: We have 2 varieties of concrete that we can mix. One is 1 part water to 3 parts concrete mix, and the other is 1 part water to 5 parts concrete mix. We want to end up with 30 lbs o

Question 710631: We have 2 varieties of concrete that we can mix. One is 1 part water to 3 parts concrete mix, and the other is 1 part water to 5 parts concrete mix. We want to end up with 30 lbs of a result that is 1 parts water and 4 part concrete. Determine how many pounds of each variety we need.
Answer by srinivas.g(540) (Show Source): You can put this solution on YOUR website!
first variety : portion of water = 1/4 (since ratio = 1:3 total 4 parts)
second variety : portion of water = 1/6 (since ratio = 1:5 total 6 parts)
mix : portion of water = 1/5 (since ratio = 1:4 total 5 parts)

1/4 1/6

1/5
proportion of first variety = (1/5 - 1/6 ) = 1/30
proportion of first variety = (1/4 - 1/5 ) = 1/20
ratio in which first variety and second variety to be mixed = 1/30 : 1/20
=2:3
total volume of the mix = 30 lbs
volume of the first variety int the mix = 2/5 *(30 )
=12 lbs
volume of the second variety int the mix = 3/5 * 30
= 18 lbs
RELATED QUESTIONS
A concrete mix is in volume proportions of 1 part cement, 2 parts water, 2 parts... (answered by HyperBrain)

A concrete mix is in volume proportions of 1 part cement, 2 parts water, 2 parts... (answered by edjones)

A 3:4:1 concrete mix means that for every 2 parts of sand, 3 parts of gravel, and 1 part... (answered by )

Concrete is made of cement, water, and aggregate (sand and gravel). Aggregate should make (answered by jorel555)

Hi a type of concrete is made of 7 parts sand,3 parts cement and 1 part lime.a batch of... (answered by Cromlix)

A store has 20 pounds of trail mix that is 3 part raisins to 2 part nuts. They have... (answered by stanbon)

Concrete is made of cement, and aggregate (sand and gravel). Aggregate should make up 75% (answered by jorel555)

concrete mix A builder makes a certain type of concrete by mixing together 1 part... (answered by dolly)

Good Evening, I have several different types of word problems that I don't know how to (answered by greenman)