A) 7 days
B) 8 days
C) \[7\frac{1}{2}\] days
D) \[6\frac{1}{2}\] days
Correct Answer: C
Solution :
One day's work of a man \[=\frac{1}{5}\] One day's work of a man and his son \[=\frac{1}{3}\] \[\therefore \] One day's work of his son \[=\frac{1}{3}-\frac{1}{5}=\frac{5-3}{15}=\frac{2}{15}\] \[\therefore \] The son of a man can do work alone in \[7\frac{1}{2}\] days.You need to login to perform this action.
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