A) 4 days
B) 5 days
C) 6 days
D) 8 days
Correct Answer: A
Solution :
\[{{M}_{1}}{{r}_{1}}{{D}_{1}}={{M}_{2}}{{r}_{2}}{{D}_{2}}\] \[\Rightarrow \,\,\,\,\,\,\,20\times 5\times 10=20\times 10\times x\] \[\therefore \,\,\,\,\,\,\,\,x=\frac{20\times 5\times 10\times }{25\times 10}\] = 4 days
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