A) \[3.5\,\,kg\]
B) \[30\,\,kg\]
C) \[1.5\,\,kg\]
D) \[20\,\,kg\]
Correct Answer: C
Solution :
Initial momentum\[=0\] Final momentum\[={{m}_{g}}{{v}_{g}}+{{m}_{b}}{{v}_{b}}\] \[(0.05\times 30)+({{m}_{g}}\times 1)=0,\,\,{{m}_{g}}=1.5\,\,kg\]
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