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A manufacturer has 600 litres of a 12% s...

A manufacturer has 600 litres of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that acid content in the resulting mixture will be more than 15% but less than 18%?

A

more than `120` litres but less than `300` litres

B

more than `140` litres but less than `600` litres

C

more than `100` litres but less than `280` litres

D

more than `160` litres but less than `500` litres

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The correct Answer is:
(a)
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