A) \[\frac{3}{11}\]
B) \[\frac{6}{11}\]
C) \[\frac{4}{11}\]
D) \[\frac{7}{11}\]
Correct Answer: B
Solution :
[b] Part filled by (A + B + C) in 3 minutes \[=3\left( \frac{1}{30}+\frac{1}{20}+\frac{1}{10} \right)=3\times \frac{11}{60}=\frac{11}{20}\] Part filled by C in 3 minutes\[=\frac{3}{10}\] \[\therefore \] Required ratio\[=\frac{\frac{3}{10}}{\frac{11}{20}}=\frac{3}{10}\times \frac{20}{11}=\frac{6}{11}\]You need to login to perform this action.
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