A) \[400\,c{{m}^{3}}\]
B) \[500\,c{{m}^{3}}\]
C) \[450\,c{{m}^{3}}\]
D) \[100\,c{{m}^{3}}\]
Correct Answer: A
Solution :
\[{{N}_{1}}{{V}_{1}}={{N}_{2}}{{V}_{2}}\] \[0.5\,N\times 100\,c{{m}^{3}}=0.1\,N\times {{V}_{1}}\] \[{{V}_{1}}=500\,c{{m}^{3}}\] Water to be added \[=(500-100)c{{m}^{3}}=400\text{ }c{{m}^{3}}\]
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