Answer:
Given -
Now, we'll calculate the work done by both the taps -
[tex] \\ \sf \: \frac{1}{4} + \frac{1}{6} \\ \\ \\ \bf \: lcm \: \: of \: \: 4 \: \: \& \: \: 6 = 12 \\ \\ \\ \implies \sf \: \frac{3 + 2}{12} \\ \\ \\ \implies \sf \frac{5}{12} \\ \\ [/tex]
Now, reciprocal it -
[tex] \\ \implies \sf \frac{12}{5} = 2 \frac{2}{5} \\ [/tex]
Therefore, time taken by both the taps will be 2 2/5 hours.