A) 6 days
B) 4 days
C) 8 days
D) 7 days.
Correct Answer: B
Solution :
[b] Given \[(6M+8B)\times 10=(26M+48B)\times 2\] \[\Rightarrow \] \[60M+80B=52M+96B\] \[\Rightarrow \] \[8M=16B\] \[\Rightarrow \] \[1M=2B\] \[\therefore \,\,\,\,15M+20B=30B+20B=50B\] \[6M+8B=12B+8B=20B\] Now, \[\begin{matrix} Boys \\ 20 \\ 50\downarrow \\ \end{matrix}\] \[\begin{matrix} Days \\ 10 \\ x(Let) \\ \end{matrix}\] \[\therefore \,\,\,x=\frac{20\times 10}{50}=4\,days\]You need to login to perform this action.
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