A) 30
B) 35
C) 40
D) 45
Correct Answer: C
Solution :
Time taken by boy \[=x\]days \[\therefore \] \[\frac{1}{10}+\frac{1}{24}+\frac{1}{x}=\frac{1}{6}\] \[\Rightarrow \] \[\frac{1}{x}=\frac{1}{6}-\frac{1}{10}-\frac{1}{24}\] \[=\frac{20-12-5}{120}=\frac{3}{120}=\frac{1}{40}\].You need to login to perform this action.
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