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How many liters of a 90% of concentrated acid needs to be mixed with a 75% solution of concentrated acid to get a 30 liter solution of 78% concentrated acid?
A3
B4
C6
D10
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take mixture and allegation diagram
90 75
\ /
78 78-75:90-78=>3:12=>1:3
/ \
3 12 the ratio becomes 1:4 he has given mixture contains 30l so according to ratios 5parts -30l
1part =6l
the ratio is 1:4 so 6L of 90%concertaed acid is mixed with 24 l of 75%concentrated acid so ans is 6l
90 75
\ /
78 78-75:90-78=>3:12=>1:3
/ \
3 12 the ratio becomes 1:4 he has given mixture contains 30l so according to ratios 5parts -30l
1part =6l
the ratio is 1:4 so 6L of 90%concertaed acid is mixed with 24 l of 75%concentrated acid so ans is 6l
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