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Inlet E was open for 2 hours and then closed. The remaining part of the tank was filled by inlets B and C working together. If inlet E alone takes 12 ...

Banking RBI Grade B Prelims Medium Number System (including HCF LCM) MCQ

Question

Inlet E was open for 2 hours and then closed. The remaining part of the tank was filled by inlets B and C working together. If inlet E alone takes 12 hours to fill the tank, inlet B alone takes 8 hours, and inlet C alone takes 6 hours, what is the total time (in hours) taken to fill the tank completely?

Options

A.

157\frac{15}{7}

B.

45×71\frac{4}{5} \times \frac{7}{1}

C.

34×71\frac{3}{4} \times \frac{7}{1}

D.

4674 \frac{6}{7}

pipes and cisternstime and workinlet ratestank filling

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