A) \[5\frac{1}{2}\] days
B) \[7\frac{1}{2}\] days
C) \[9\frac{1}{2}\] days
D) \[12\frac{1}{2}\] days
Correct Answer: B
Solution :
By MDH formula, \[25\times d=20\times \,(d+3)\] \[\Rightarrow \] \[d=12\] days \[\therefore \] \[25\times 12=40\times d\] \[\Rightarrow \] \[d=7\frac{1}{2}\] days
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