A) \[\frac{1}{24}\]days
B) \[\frac{7}{24}\]days
C) \[3\frac{3}{7}\]days
D) 4 days
Correct Answer: C
Solution :
(c): As seen earlier, together they will do in \[\frac{1}{\frac{1}{24}+\frac{1}{6}+\frac{1}{12}}\]days. \[=\frac{1}{\frac{1+4+2}{24}}=\frac{24}{7}\] = \[3\frac{3}{7}\]days.
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