A) 4 km/h
B) 1 km/h
C) 2 km/h
D) 3 km/h
Correct Answer: B
Solution :
Applying law of conservation of momentum \[m\times 3=(m+2m){{v}_{1}}\] So, \[{{\upsilon }_{1}}=1\,km/hour\]You need to login to perform this action.
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