Question

Pipe 'A' can fill a tank on its own in 14 minutes. When pipes 'A' and 'B' are both opened at the same time, the tank is filled in 18 minutes. Determine how long it would take for pipe 'B' alone to drain half of the tank's capacity.

A 31.5 minutes
B 25 minutes
C 35 minutes
D 27.5 minutes
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