A) 100 minutes
B) 110 minutes
C) 120 minutes
D) 125 minutes
Correct Answer: A
Solution :
Let pipe C empty the full tank in x minutes. According to the question, \[\frac{1}{60}+\frac{1}{75}-\frac{1}{x}=\frac{1}{50}\] \[\Rightarrow \] \[\frac{1}{x}=\frac{1}{60}+\frac{1}{75}-\frac{1}{50}\] \[=\frac{5+4-6}{300}=\frac{3}{300}=\frac{1}{100}\] \[\therefore \] \[x=100\]minutesYou need to login to perform this action.
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