A) 7 L
B) \[5\frac{1}{6}\text{L}\]
C) 5 L
D) \[4\frac{2}{3}\text{L}\]
Correct Answer: D
Solution :
Let x litres of liquid P be mixed of 7 L of liquid. According to the question, \[x\times \frac{10}{7}+\frac{5}{7}\times 7=x+7\] \[\Rightarrow \] \[\frac{10x}{7}+5=x+7\] \[\Rightarrow \] \[10x+35=7x+49\] \[\Rightarrow \] \[10x-7x=49-35\] \[\Rightarrow \] \[3x=14\] \[\Rightarrow \] \[x=\frac{14}{3}=4\frac{2}{3}\text{L}\]You need to login to perform this action.
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