A) 60
B) 84
C) 90
D) 86
Correct Answer: C
Solution :
Let leak can empty the full tank in x h Due to leak, cistern is filled in \[9+1=10\,h\] \[\therefore \] \[\frac{1}{9}-\frac{1}{x}=\frac{1}{10}\] \[\therefore \] \[\frac{1}{x}=\frac{1}{9}-\frac{1}{10}=\frac{1}{90}x=90\]You need to login to perform this action.
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