A) \[2\,\,cm/s\]
B) \[8\,\,cm/s\]
C) \[6\,\,cm/s\]
D) None of these
Correct Answer: B
Solution :
Given,\[s={{t}^{3}}+2{{t}^{2}}+t\] \[\therefore \]Speed\[v=\frac{ds}{dt}=3{{t}^{2}}+4t+1\] At\[t=1\], \[v=3{{(1)}^{2}}+4(1)+1\] \[=8\,\,cm/s\]You need to login to perform this action.
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